Joe has finished his first-aid course. He proves extremely helpful as a rescue worker.

A.A. Although Joe proves extremely helpful as a rescue worker, he hasn’t finished his first-aid course.

B.B. Having finished his first-aid course, Joe proves extremely helpful as a rescue worker.

C.C. Without finishing his first-aid course, Joe proves extremely helpful as a rescue worker.

D.D. However helpful Joe proves as a rescue worker, he hasn’t finished his first-aid course.

Đáp án và lời giải

Đáp án:B

Lời giải:

B. Sau khi hoàn thành khóa học sơ cứu của mình, Joe tỏ ra vô cùng hữu ích với tư cách là một nhân viên cứu hộ.

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