27.I was surprised to receive a _________ vase on my birthda

27.I was surprised to receive a _________ vase on my birthday.
A.blue big crystal B.big blue crystal C.crystal big blue D.big crystal blue
28.Jack is good at playing _________ chess,but poor at playing _________ violin.
A./,a B.the,/ C./,the D.the,a
29.All of us hope ________.
A.you will win in the final.B.you to win in the final.
C.you win in the final.D.win in the final.
30.Pollution is one of _________ in today’s society.
A.serious problems B.the most serious problem
C.the most serious problems D.more serious problems
31.The little boy is _________ understand such a complicated problem.
A.old not enough to B.not enough old to
C.don’t old enough to D.not old enough to
32.Make sure that everybody must ________ this important meeting.
A.to attend B.to take part in C.attend D.take part in
33.He’s seldom late for school,_________?
A.doesn’t he B.is he C.does he D.isn’t he
34.They ________ have so much money in this plan.
A.needn’t to B.don’t need C.don’t need to D.not need
35.Water runs ________ pipes into everybody’s home.
A.pass B.through C.across D.over
36.People usually like the person who talks ________ a friendly way.
A.in B.with C.of D.on
37.Discussing in groups made it easier ________ this difficult problem.
A.solving B.solve C.to solve D.solved
38.In this sentence,_______ ‘m’ in the word ‘message’ should be in capital letter.
A.the B.an C.a D./
39.--_______ will you finish doing your homework?
--In about half an hour.
A.How long B.How often C.What time D.How soon
40._________ a little girl,she knows more than the others of the same age.
A.Since B.As C.Though D.For

B B C C
D C B C D
A B A A C