How can I know _____book is yours? They are so alike.
A.which
B.what
C.this
D.the

I wish you ______now. Can’t you stay a bit longer?
A.don’t have to leave
B.didn’t have to leave
C.hadn't to leave
D.hadn’t left

If we don’t _____on electricity, there will be power cut.
A.economic
B.economics
C.economical
D.economize

In this school, most_____ very hard.
A.of students work
B.students work
C.student works
D.of student work

He did not share his secrets with many people but _______he in her.
A.confided
B.confessed
C.concealed
D.consented

When she heard that bad news, she burst _______
A.into crying
B.out crying
C.crying
D.out to tears

l find the time of English meals very strange. I‘m not used to______ dinner at 5 pm.
A.to have
B.to having
C.having
D.have

Nothing (do)......... since I moved here.
A.did
B.has done
C.has been done
D.does

Measles (take)......... a long time to get over.
A.has taken
B.took
C.takes
D.is taking

If anybody______ a question, please ask me after class.
A.has
B.have
C.had
D.were