(2013·合肥一中二模)The school recommends parents ________ their children to swim in rivers or lakes during summer holidays.
A．not permit B．do not permit
C．mustn't permit D．couldn't permit
(2013·合肥第二次质检)Martin hasn't been in touch with me for ages. He ________ my new cellphone number.
A．needn't get B．mustn't get
C．can't get D．shouldn't have got
(2013·江西九江二模)If you won't do as I tell you, you ________ get the chance to be promoted because the competition is just too fierce.
A．couldn't B．mustn't
C．shouldn't D．shan't
(2013·江苏南通市二模)We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.
A．mustn't B．couldn't
C．needn't D．wouldn't
(2013·四川省都江堰市二模)—Mike, I can't find my watch anywhere.
—You ________ it while working out.
A．may have lost B．could have lost
C．would have lost D．should have lost
(2013·成都第二次诊断)—Where did you get this book?
—I picked it up from a secondhand bookshop if you ________ know.
A．must B．will
C．can D．shall
