--- Where do you think ______ he ______ the computer?
 --- Sorry. I have no idea.
| A.has; bought | B.不填; bought | 
| C.did; buy | D.不填; buys | 
.Now natural disasters happen one after another, ______ warns man to treat nature kindly.
| A.it | B.that | C.which | D.as | 
It is usually cool in April in Chongqing, but it sometimes ______ be rather hot for a few days.
| A.can | B.must | C.shall | D.ought to | 
Two decades ago this city was ______ but a small unknown town.
| A.something | B.anything | C.everything | D.nothing | 
—Why didn’t you go to Shelly’s birthday party yesterday evening?
 —I ______ but I had an unexpected visitor.
| A.intended to | B.had intended to | C.was intended to have | D.had intended to have | 
He didn’t attend the competition ______ he was ill at the time.
| A.in that | B.in which | C.where | D.when |