* Mark the letter A, B, C, or D...

Câu hỏi: * Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

A. Now our parents are still alive to be grateful to and to be thanked for what they have done for us. 

B. If our parents are not alive, we will not need to be grateful to them and thank them for what they have done for us. 

C. We should be grateful to our parents when they are still alive and thank them for what they have done for us. 

D. Our parents will live longer if we are grateful to them and thank them for what they have done for us.