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.