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I really wonder____ he has posted me many parcels_____ we didn't work together.
A．how ,afterB．why, whenC．when, beforeD．why, since
D
考查連詞。我真的很想知道自從并不在一起工作后，他寄給我許多包裹。since引導的從句中用過去時，主句用現(xiàn)在完成時。
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