问题

— Is there any possible way to help the children get rid of such a bad habit? — To be honest, it’s very hard, but we ____ on this problem. [ ]

A: work
B: worked
C: are working
D: were working

正确答案是：

同类题型

Some parents are just too protective.They want to ________ their kids from every kind of danger, real or imagined.[ ]

4．My hands are dirtyI ______ the wall the whole morning but haven’t finished yet

The __________ of his books among parents and therecommendation of experts both at home and abroad have quickly made him acelebrity educator.

I didn’t do well in this English examination. How about you? —-I did _____ you.

The boy mademistakes in this exam so he got a higher grade.