英语 选择 （请说明为什么选那个答案）

英语 选择 （请说明为什么选那个答案）
1.Mike should ___ his homework on time every day.
A.hand in B.hangs in C.handing in
2.Don't ___ about Tom's study.
A.worries B.worried C.worry
3.Mr Li is never late ___ work.
A.for B.to C.go to
4.May I speak to Mrs Webb?---___
A.Speaking.B.I'm Mrs Webb C.I'm speaking
5.My brother always goes to bed ___ than me.
A.late B.early C.later