50.-Listen! Helen is singing in the hall.
-It be Helen. She has gone to Beijing.
A.can’t B.may C.mustn’t D.should
49.Attention, please. I have to tell you.
A.nothing serious B.serious nothing C.something serious D.serious something
48.Don’t open the window it is so cold.
A.because B.because of C.since D.as
47.The socks are small for the boy.
A.too much B.too many C.much too D.many too
46.-Would your brother go for a picnic this Sunday?
-If I do, .
A.so does he B.so will he C.so he does D.so he will
45.Scientists should new ways to solve the pollution problem.
A.catch up with B.come up with C.keep up with D.make up with
44.The dentist the man’s teeth and found nothing serious with him.
A.looked after B.looked for C.looked over D.looked at
43.-Mum, I think I’m to get back to school.
-Not really, my dear. You’d better stay at home for another day or two.
A.well enough B.so well C.good enough D.so good
42.I like both of the skirts. I really don’t know .
A.to choose what B.to choose which C.which to choose D.How to choose