Câu hỏi: The proposal seemed like a good idea. The manager refused it.

A. The manager didn't like to proposal because it didn't seem a good idea.

B. Since the proposal seemed like a good idea, the manager refused it.

C. The manager refused the proposal although it seemed like a good idea.

D. The proposal didn't seem like a good idea, so the manager didn't accept it.

Câu 1: Some snakes have hollow teeth they are called fans that they use to poison their victims.

A. Some 

B. they are called

C. use

D. their

Câu 2: An endangered species is the one _________ population is so small that it is in danger of becoming extinct.

A. which

B. what

C. whose

D. who

Câu 3: While Peter ________the rose bush in the back yard, the phone rang.

A. were watering

B. has watered

C. watered

D. was watering

Câu 4: She raised her hand high. She wanted to attract her teacher’s attention.

A. Because her teacher attracted her, she raised her hand high.

B. She had such a high raising of hand that she attracted her teacher’s attention.

C. Though she raised her hand high, she could not attract her teacher’s attention.

D. To attract her teacher’s attention, she raised her hand high.

Câu 5: We should participate in the movement _________to conserve the natural environment.

A. which organized

B. organizing

C. to organize

D. organized

Câu 6: _________, we would have been forced to sack him.

A. Were he not to resign

B. If he resigned

C. Had he not resigned

D. If he had resigned