This sentence needs _________.             .

　　A. improvement        B. improved         C. improving        D. improved

It’s time_________ the table for dinner.

A. to pull　 B. to lay　　 C. preparing　 D. putting out

It was many many years ago _________ he paid his first visit to London .

A. that   B. when       C. since        D. for

You will find the word “physics” _______ under “P” in the dictionary.

A. have listed　 　　　 B. to be listed　　　 　 C. listed　　　 　　 D. being listed

Between the two generations， it is often not their age，　　　　 their education that causes misunderstanding.?

A.like　　　　　　　 B.as　　　　　　　　　　 C.or　　　　　　 D.but　　

The computer center, _____last year, is very popular among the students in this school.

　　A. open B. opening C. having opened D. opened

The volleyball match will be put off if it______ .
   A. will rain     B. rains      C. rained     D. is raining

_____ the book, you ought to read the “Introduction” carefully.
  A. Making the best of B. Doing the best for   C. To make the best of D. To do the best for

Astronomers estimate 　　　 called the Pleiades in the constellation Taurus is 415 light?years away from Earth.

A.that a loose cluster of stars?　　 B.a loose cluster of stars is ?

C.that is a loose cluster of stars?　　 D.there is a loose cluster of stars