---All the building materials have been washed away.

---So I have heard. But there was no sign ______ a heavy rain was on the way last night.

  A. when          B. If          C. which       D. that   

 The sale usually takes place outside the house, with the audience ______ on benches, chairs or boxes.

A. having seated    B. seated      C. seating      D. having been seated   

 In the UK, what impressed exchange students most was the Student Activity,         they could get lots of information outside.

   A. where        B. that        C. which        D. when 

 Nobody could have guessed, in those days, the place in history that Martin Luther King, Jr ____.

A. was having    B. was to have      C. had had      D. Had   

 --- When will you be through with your work, Jones?

--- ______ My boss usually finds something for me to do at the last minute.

A. Who knows.           B. Would you help me?

C. I beg your pardon?       D. Anything the matter?     

 --- It’s said that there are more than 1 million citizens in the county.

---Exactly. One reason is that people are            into it in great numbers.

A. breaking         B. filling        C. pouring         D. hurrying         

 I did not accept any of the many offerings, because I found         satisfactory.

A. neither of them    B. none of them       C. either of them      D. all of them not 

 Nearly a month had gone by        they showed some sign of giving up the price for which they had held out.

A. until          B. while        C. before         D. so that       

 In the years        , the city government will take effective measures to bring the price of the house under control.

A. following       B. followed        C. follow           D. to follow  

 According to some doctors, one of the ways to prevent us from growing old is to make sure that our brains get enough___.

A. performance     B. exercise       C. experience    D. sport