621.Simon made a big bamboo box ______ the little sick bird till it could fly.
A.keep
B.kept
C.keeping
D.to keep
622.Sarah pretended to be cheerful,_______ nothing about the argument.
A.says
B.said
C.to say
D.saying
621.答案是D;动词不定式to keep the little sick bird表示目的状语。
622.答案是D;考查非谓语动词。此处saying表示伴随。



