Câu hỏi: In bacteria and other organisms, ............

A. it is the DNA that provides the genetic information

B. which is the DNA that provides the genes

C. the DNA providing the genetic information

D. the DNA that provides the genetic information 

Câu 1: ............., he wouldn’t have missed the train

A. If he listened to me

B. Unless she had listened to me

C. If he had listened to me

D. If he didn’t listen

Câu 2: Alex did not do very well in class............ 

A. therefore he was a good student

B. because he failed to study properly

C. although he was not hard-working

D. as long as he had studied badly

Câu 3: There were two small rooms in the beach house,                     served as a kitchen.

A. the smallest of which

B. smallest of that 

C. the smaller of which

D. the smaller of them

Câu 4:                      , he was determined to continue to climb up the mountain. 

A. He felt very tired though

B. As he might feel tired

C. Tired as it was

D. Tired as he might feel

Câu 5: Scientists say forests are being destroyed by air pollution. 

A. Scientists are blamed for destroying forests.

B. Scientists blame air pollution for the destruction of forests.

C. Forests are said to destroy air pollution.

D. According to scientists, there's much air pollution in the forests. 

Câu 6: I wish George had come to Italy with us. 

A. I am pleased that George came to Italy with us. 

B. I am sorry that George isn't going to Italy with us. 

C. I hope that George will go to Italy with us.

D. I am sorry that George didn't come to Italy with us.