---How much _____ the elephant ______? ---Perhaps the ______ of it is 2 tons.
—This physics problem is too difficult. Can you show me _____, Wang Li?—Sure.A.what to work it outB.how to work it outC.how to work out it
Study hard , then your dream will _____. A.realize B.realizing C. be realized
—Did you go to Tim’s birthday party? —No, I _____. A.am not invited B.wasn’t invited C.haven’t invited
Computers are very useful, they can _____ sending e-mails. A.be used to B.be used with C.be used for
I _____ go to bed _____ my father came back.A.won’t, until B.will, until C.didn’t, until