13.If I______, I would have said hello.
A. had seen B. saw C. see D. would see
16. If she______ him, she would be very happy.
A. met B. had met C. meets D. has meet
22. To______ is to become, or making something become, twice as much as or as many as usual.
A. double B. increase C. decrease D. rise
25. _______ the company offers the job, I’ll take it.
A. Should B. Will C. If D. Unless
