1 . —Where is Susan going?
—She ________ go to the library, but I am not sure.
—She ________ go to the library, but I am not sure.
| A．can | B．must | C．need | D．might |
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2 . —Do you know the answer to the question?
—It _________ be “A”, but I’m not sure.
—It _________ be “A”, but I’m not sure.
| A．should | B．might | C．must |
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3 . Peter studies hard. He ________ be a scientist one day.
| A．need | B．might | C．can’t | D．mustn’t |
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4 . —Will Nancy go to the movies with us?
—I’m not sure. She ________ have something else to do.
—I’m not sure. She ________ have something else to do.
| A．might | B．should | C．can | D．must |
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5 . —Does your brother like cartoons?
—He ________ like them, but I’m not sure.
—He ________ like them, but I’m not sure.
| A．can | B．might | C．must |
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6 . —Kate, where is your brother?
—He _________ be in the library. I’m not sure.
—He _________ be in the library. I’m not sure.
| A．might | B．must | C．can’t | D．mustn’t |
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7 . —Why didn’t Brian come to school?
—I don’t know. He _______ be ill.
—I don’t know. He _______ be ill.
| A．might | B．would | C．can | D．must |
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8 . —Whose bike is that?
—It ________ be Mr. Smith’s, but I’m not sure.
—It ________ be Mr. Smith’s, but I’m not sure.
| A．might | B．can’t | C．must |
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9 . I’m not sure who likes the red skirt. I guess it ________ be Lucy’s.
| A．must | B．can’t | C．might | D．needn’t |
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10 . —Where are you going this month?
—We __________ go to Xiamen, but we’re not sure.
—We __________ go to Xiamen, but we’re not sure.
| A．needn’t | B．must | C．might | D．mustn’t |
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