A. As long asB. UnlessC. Now thatD. While

【题目】The newcomer went to the library the other day and scarched for he could find about Mark Twain.
A. wherever
B. however
C.whatever
D.whichever

—Thanks. I __________ French in Sichuan University for four years.

A.studiedB.studyC.was studyingD.had studied

【题目】Jack is a great talker. It's high time that he something instead of just talking.
A. will do
B. has done
C.do
D.did

【题目】Not until he retired from teaching three years ago having a holiday abroad.
A. he had considered
B. had he considered
C. he considered
D. did he consider

【题目】I feel so excited! At this time tomorrow morning I to Shanghai.
A. will be flying
B. will fly
C. have been flying
D. have flown