Dãy gồm các chất đều tác dụng với AgNO₃ trong dung dịch NH₃ là: 

A. anđehit fomic, axetilen, etilen

B. axit fomic, vinylaxetilen, propin

C. anđehit axetic, but-1-in, etilen.

D. anđehit axetic, axetilen, but-2-in.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the

following questions.

You're 18! You ________ to be able to look after yourself by now.

A. are advisable

B. expect

C. suppose

D. are supposed