(2013·甘肃河西五市一模)Look! The ground is wet. It must have rained last night, ________？
A．hasn't it B．hadn't it
C．mustn't it D．didn't it
(2013·郑州一模)—Did you tell her the bad news?
—Yes, but I'd rather ________.
A．didn't B．not
C．not have D．hadn't
(2013·皖南八校第一次联考)He is only too ready to help others, seldom, ________， refusing them when they turn to him.
A．if never B．if ever
C．if not D．if anything
(2013·安徽省芜湖三校一模)A recent study has found that the number of smokers ________ sharply over the past five years.
A．is increasing
B．are increasing
C．has been increasing
D．have been increasing
(2013·山东济宁一模)How close parents are to their children ________ a strong influence on the development of the children's characters.
A．having B．had
C．has D．have
(2013·安徽合肥三校一模)—Was it at 11 o'clock ________ your father came back last night?
—Yes, he is always coming back so late.
A．that B．while
C．when D．until
