Both his parents look sad . Maybe they __what's happened to him .
| A．knew | B．have known |
| C．must know | D．will know |
The boy often forgets his homework. So his teacher is angry
| A．does | B．to do | C．doing | D．did |
John was walking to school, he saw a cat in a tree.
| A．Because | B．Since | C．While | D．If |
Tom will visit our farm two weeks
| A．in | B．after | C．during | D．on |
He said he _____to the beach every Saturday.
| A．go | B．goes | C．went | D．going |
Could you give me ___advice?
| A．a few | B．any | C．some | D．a little |