Cho hình nón có đường sinh $l=5\text{cm}$ và bán kính đáy $r=4\text{cm}$ . Diện diện tích xung quan của hình nón bằng

Find a mistake in the four underlined parts of the sentence and correct it:

Though her difficult living condition, Marie worked extremely hard to earn a degree.

Find a mistake in the four underlined parts of the sentence and correct it:

A United Nations tried to solve some global environmental problems.

Find a mistake in the four underlined parts of the sentence and correct it:

I really think that apologizing is a little you can do now.

Choose the word that has the underlined part pronounced differently from the rest: 

seafood                   release                    threaten                 beneath  

Choose the word that has the underlined part pronounced differently from the rest: 

however                   know                      follow                    show

Choose the word that has the underlined part pronounced differently from the rest: 

careful                         atmosphere                        share                       everywhere 

Choose a word that has different stress pattern:

ocean                 divide                  modern              water

Choose a word that has different stress pattern:

temperature                     photograph                  information                  consequence

Choose a word that has different stress pattern:

organism                       investigate                     diversity                   technology

Read the following passage and choose the best answer for each blank:

                                   TAM DAO NATIONAL PARK
      Tam Dao National Park is a (1)______ area zone in North Vietnam. It was established in 1996, succeeding from The Conservation Forest Tam Dao, (2)_______ was formed in 1977. The park is about 85 km northwest of Hanoi.
      Tam Dao National Park is based in the Tam Dao range. It (3)_________ 80 km from northwest to southeast, and (4)________ more than 20 peaks with an altitude of over 1000m. The tallest summit is Tam Dao North with an altitude of 1592 m. Three other peaks with beautiful (5)__________ are Thien Thi at 1375 m, Thach Ban at 1388 m and Phu Nghia at 1300 m.
      Tam Dao town was established by French colonists (6)________ the beginning of 20^th century as a peaceful resort in (7)__________ Vietnam. Several luxurious villas (8)________ for the French still remain. It is now an enclave administratively belonging to Vinh Yen city.
      Seventy per cent of the area of the park is covered by natural and artificial forest. The natural forest is about 220 km² and the human altered forest is about 30 km².
      Due to the tall mountainous range that splits the area into two parts, the national park's climatic condition is (9)________ into two areas with different rainfalls. This difference and some other factors such as the effect of human activity divide the park into some smaller climatic zones which increase the (10)_________ in the park.

1. A. protect               B. protecting                C. protected                 D. protection
2. A. which                 B. who                          C. that                         D. this
3. A. walks                 B. continues                 C. drives                      D. runs
4. A. gets                   B. has                          C. obtains                    D. bears
5.A. scenery               B.scene                       C. sight                        D. outlook
6. A. in                       B. for                           C. at                             D. by
7. A. northern            B. southern                 C. western                   D. eastern
8. A. was designed    B. be designed            C. designing                D. designed
9. A. divided               B. formed                    C. classified                  D. worked out
10. A. diversity           B. bio-diversity            C. biology                     D. ecology