have, for, time, they, a, worked, long
_________________________________________________________.
should, rules, the, we, obey, traffic
_________________________________________________________.
The bowl ________ by your son. But I am not sure.
A.may break B.may be broken C.must break D.must be broken
It's difficult to get to the other side of the river. Maybe a bridge ________ over it.
A.should be built B.should build C.has built D.has been built
No matter how many difficulties we meet, I believe all the problems________ in the end.
A.will be solved B.were solved C.solved D.are solved
A speech on environmental protection ________ in the school hall. All students look forward to it.
A.gives B.is given C.will give D.will be given
