It’s ________ unusual chance for Mr White to get such ________ useful advice.

A. an; /     B. a; an      C. a; the    D. an; an

 — Which do you prefer, coke or juice?   —________ is OK. But water will be better if possible.

A. Both     B. Either    C. None     D. Neither

 —________I complete so much my homework now?

— No, you ________.You can do it after supper.

A. May; ought not to         B. Should; can’t     

C. Can; mustn’t                   D. Must; needn’t

There are large numbers of school buses ________designed for primary schools in Taizhou.

A. especially      B. specially              C. probably             D. particularly

 The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.

A. is explained  B. will be explained        C. explains　          D. has explained

I think your suggestions are of great ________ to me and they are well worth ________.

A. valuable; to offer    B. valuable; giving     C. value; taking   D. value; to follow

Mr Chen told us that three fourths of the earth ________covered with water.

A. were     B. is  C. was        D. are

The new iphone 5 costs so________that I don’t think a student can________ it.

A. expensive; buy     B. high; offer          C. much; afford      D. dear; pay