—Where is Bob? I cannot find him anywhere.
—He have been off long. I heard him make a call 
just now.
| A．shouldn’t | B．can’t | C．mustn’t | D．needn’t |
推荐套卷
—Where is Bob? I cannot find him anywhere.
—He have been off long. I heard him make a call just now.
| A．shouldn’t | B．can’t | C．mustn’t | D．needn’t |
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