Be careful with such things. If you          , you’ll drop them.
A．don’tB．won’tC．a(chǎn)ren’tD．do
C
考查時態(tài)和省略形式。因為上文提及了be careful可知是 系動詞，那么后面也應(yīng)該使用系動詞。句意：對于這樣的事情要當心一點，如果你不當心，…
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