— I like your new shoes!— Thanks. I had to try on almost a ..

— I like your new shoes!— Thanks. I had to try on almost a dozen pairs _____ I decided to get them.A. as B. when C. after D. before

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(2013·长沙二模)—The research on the new flu virus vaccine is..

(2013·长沙二模)—The research on the new flu virus vaccine is challenging and demanding.Who do you think can do the job?—________ my students have a try?A．May B．MustC．Will D．Shall

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—It's no easy task to catch a ticket on a website that rece..

—It's no easy task to catch a ticket on a website that receives 1 billion clicks daily.—I can't agree with you more. There ________ be errors for every single step.A．should B．mustC．can D．will

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She ______ have attended that meeting, for she was doing pap..

She ______ have attended that meeting, for she was doing paperwork in the office then.A．shouldn’tB．mustn’tC．wouldn’tD．couldn’t

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—Whom did you ________ the packet at the post office?—Jack...

—Whom did you ________ the packet at the post office?—Jack.There________ masses of work for him to do, but he managed to finish the work as required.[ ]A. have fetched; was B. have fetch; wereC. have to fetch; wereD. have fetch; was

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