[单项选择]

M: If you had waited until after the Christmas holidays, you could have bought that dress for much less.
W: I know that, but I needed it immediately. I had a wedding reception to attend.

When had the woman purchased the dress（）
A. Shortly after Christmas.
B. In the spring.
C. During the Christmas season.
D. During the sale.

[单项选择]

M: If you had waited until after the Christmas holidays, you could have bought that dress for much less.
W: I know that, but I needed it immediately. I had a wedding reception to attend.

When had the woman purchased the dress（　）.
A. Shortly after Christmas.
B. In the spring.
C. During the Christmas season.
D. During the sale.

[单项选择]A. You had a good time after you finished the work.
B. You need more time to finish the job.
C. There was plenty of time to finish the work.
D. You have to finish the work in time.

[单项选择]It was until last year had he （　）.
A. left his hometown for a new start
B. came to realize the importance of learning English
C. worked as an English teacher at a middle school
D. set out to build a new house of his own

[填空题]offers are valid until after 30th September.

[单项选择]Chemistry did not emerge as a science until after the scientific revolution in the seventeenth century and then only rather slowly and laboriously. But chemical knowledge is as old as history, being almost entirely concerned with the practical arts of living. Cooking is essentially a chemical process; so is the melting of metals and the administration of drugs and potions. This basic chemical knowledge, which was applied in most cases as a rule of thumb, was nevertheless dependent on previous experiment. It also served to stimulate a fundamental curiosity about the processes themselves. New information was always being gained as artisans improved techniques to gain better results.
The development of a scientific approach to chemistry was, however, hampered by several factors. The most serious problem was the vast range of material available and the consequent difficulty of organizing it into some system. In addition, there were social and intellectual difficulties, chemistry is
A. The scientific revolution in the seventeenth century.
B. Reasons that chemistry developed slowly as a science.
C. The practical aspects of chemistry.
D. Difficulties of organizing knowledge systematically.

[单项选择]Not until the bell had rung（）the classroom in a hurry.
A. he came into
B. did he come into
C. he has come into
D. has he come into

[单项选择]Not until the game had begun ______ at the sports ground.
A. had he angled
B. would he have arrived
C. did he arrive
D. should he have arrived

[简答题]Only after they had performed hundreds of experiments _____________________ (他们才成功地解决了这个问题)

[填空题]Only after he had finished watching the football game _________________________ (他才开始写报告).

[填空题]After he had given an account of the difficulties, he went on (suggest) （） ways of overcoming them.

[填空题]After they had finished building the lab，the expert inspected it _______________________(以确保工作质量没有问题)．