—This physics problem is too difficult. Can you show me _____, Wang Li?
—Sure.
A.what to work it out
B.how to work it out
C.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
My uncle is leaving for Shanghai. I have to _____.
A. see him off B. take him off C. see off him
