21.His room was ______ a mess when I entered.

21.His room was ______ a mess when I entered.
A.of B.on C.in D.with
22.The film _________ for nearly half an hour.
A.has been on B.had begun C.had been on D.has begun
23.I’ve got three tickets ________ the concert tonight,would you like to go with me?
A.of B.for C.to D.on
24.We all ___________ our monitor.
A.voted Jane to be B.elected for Jane C.voted for Jane D.elected Jane to be
25.You _________ play in the street,it’s too dangerous.
A.ought to not B.shouldn’t to C.oughtn’t to D.ought to
26.He suggested Mary _________ for permission first.
A.to ask B.asking C.asks D.ask
27.It’s your responsibility _________ the meeting this time.
A.to arrange B.arrange C.arranging D.will arrange
28.The number of the students in our grade ______ about 300,_______ of them are girls.
A.are,two-thirds B.is,two-third C.is,two-thirds D.are,two-third
29.I knew nothing about it _______ your sister told me.
A.because B.if C.since D.until
30.--Tom said that MP3 in that shop will be on sale the next week.
--Really?I’m just thinking about buying _______.
A.one B.it C.this D.that
31.Nowadays most people think ______important to protect the environment.
A.it is B.it C.that D.this
32.He couldn’t buy the book because he had ________ money with him.
A.a few B.a little C.few D.little
33.I think Jane’s handwriting is much better than _______.
A.his B.her C.Tom D.your
34.Everyday I spend more than 2 hours _________ my homework.
A.finishing to do B.to finish to do C.to finish doing D.finishing doing
35.There is a Smith _______ for you downstairs.
A.to wait B.waiting C.was waiting D.is waiting
36.He _________ to clean the office every day,he may do it every two days.
A.needs B.needn’t C.doesn’t need D.needed
37.It’s considerate ________ you to lead the blind man to his seat.
A.of B.for C.with D.in
38.Helen enjoyed her stay in France so much that she decided to stay there for _____ three days.
A.another B.the other C.other D.the others