1、He does his homework much ------ than he did two years ago

1、He does his homework much ______ than he did two years ago.
A.careful B、more careful C.more carefully
【C】
2.It was raining _____ when I woke up last night.
A.heavy B.heavily C.heavier
【B】
3.The accident ______ a rainy norning.
A.happened on B.happened to C.happened
【A】
4.Did you find ______ very interesting to play yo-yo?
A.this B.it's C.that D.it
【D】【解释一下形式主语和形式宾语的区别】
5.Be careful when you ______ a busy street.
A.go across B.across C.cross D.crossing
【C】
6.——She is an outstanding pianist,isn't she?
——_________
A.Sure is she B.She sure is C.Is she sure
【B】