Question

It's going to rain．I think it is better ________ at home than ________ out for a walk．

1. A.
   to stay; going
2. B.
   to stay; to go
3. C.
   stay; go
4. D.
   go; went

Answer 1

B
受had better句型的影响易误选C．it是形式主语，真正的主语用不定式充当，因此，第一空填to stay．than前后两成分表示对比关系，形式上要一致，故后面也要用不定式．