2,帮解下题,我分多,正确率高还可加分,

2,帮解下题,我分多,正确率高还可加分,
11.You should go to the grand opening ceremony,____________
A.aren't you
B.shouldn't you
C.wouldn't you
D.don't you
满分：2 分
12.People appreciate____________ with him because he has a good sense of humor.
A.to work
B.to have worked
C.working
D.have working
满分：2 分
13.He thought that ____________.
A.the effort doing the job was not worth
B.the effort was not worth in doing the job
C.it was not worth the effort doing the job
D.it was not worth the effort by doing the job
满分：2 分
14.The problem of housing____________ leads to the problem of social instability.
A.itself
B.must
C.did
D.never
满分：2 分
15.They found a pile of gold at the entrance.There was____________ more inside the cave.
A.yet
B.still
C.many
D.lot of
满分：2 分
16.The little girl must have lain there for a long time,____________
A.mustn't she
B.hasn't she
C.wasn't she
D.didn't she
满分：2 分
17.In such dry weather,the flowers will have to be watered if they____________.
A.have survived
B.are to survive
C.would survived
D.will survive
满分：2 分
18.There____________more than 300,000 kinds of plants on the earth.
A.is
B.are existing
C.exists
D.exist
满分：2 分
19.Anyone ____________ a term in prison will not be hired by that company.
A.serving
B.to be served
C.having served
D.being served
满分：2 分
20.You aren't using this typewriter,____________
A.are you
B.do you
C.will you
D.have you

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