He saw an accident when he was waiting by the bus

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Câu 28: He saw an accident when he was waiting by the bus.
D
Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original
sentence in each of the following questions.
Đáp án của bạn: A
B
Câu 29: Hydroelectric power/ used/produce/ electricity.
A. Hydroelectric power are used to producing electricity
B. Hydroelectric power are used to produce electricity
C. Hydroelectric power is used to producing electricity
D. Hydroelectric power is used to produce electricity
Đáp án của bạn:
A
D
Câu 30: It /expensive/build/ solar power stations.
A. It is very expensive building solar power stations.
B. It is very expensive building a solar power stations.
It is very expensive to build solar power stations.
It is very expensive to build a solar power stations.
C.
D.
Đáp án của ban:
A
B
D