Liu Hua often helps her sister__________lessons.[ ]
一Are you going to Guilin by plane?一It’s fast but expensive, so I’m not sure.I ________ take a train.
What______movies do you like?—I like comedies.[ ]
It’s very nice _____ you to give me two tickets _____ the film.[ ]
Each of us has to write a ________ report every two weeks.