Khi thủy phân hợp chất hữu cơ X (không có phản ứng tráng bạc ) trong môi trường axit rồi trung hòa axit thì dung dịch thu được có phản ứng tráng bạc. X là

A. Anđehit axetic

B. Glixerol

C. Saccarozo

D. Mantozo

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

It's ages since I last saw a Hollywood film

A. I saw a last Hollywood film since ages ago

B. I haven't seen a Hollywood film for a long time

C. I haven't seen any Hollywood films before

D. It's ages because I last saw a Hollywood film

Malaria is a disease __________ by the anopheles

A. transmit

B. transmitting

C. is transmitted

D. transmitted