It _______it is parents respons...

Câu hỏi: It _______it is parents responsibility to take good care of their children.

A. commonly says that

B.  commonly to be said that

C. is commonly said that

D. is commonly saying

A. Could you give me a lift

B.  Would you mind if I smoked

C. What do you plan to do

D. Would you like a cup of tea

A. have been/are built

B.  was/were built

C. was /would be built

D. had been/ were built