根据句意，写出括号内所给单词的适当形式。

小题1:It seemed that there were as many       (Asia) as there were Canadians.

小题2:Dolly is the first      (clone) sheep in the lab.

小题3:True        (friend) is worth more than money. 

小题4:Because of heavy work, many students feel      (sleep) in afternoon classes.

饭店的碗筷必须在每次用后消毒，这是（）。

A.终末消毒

B.化学消毒

C.随时消毒

D.物理消毒

E.预防消毒