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【題目】What is the man doing there?

【題目】—What happened to the young trees we planted last week?

【題目】What is the probable relationship between the two speakers?

【題目】Which is the best way to get to the Water Cube at the moment?

【題目】Is it he or you ________ in charge of the job and supposed to complete it punctually?

【題目】What time is it now?

【題目】This house is almost ________ to the one where I lived as a child.

【題目】The scientist does not study nature ________ it is useful to do so. He studies it because he takes pleasure in it.

【題目】This was returned because the person ________ this letter was addressed had died three years ago.

【題目】Once you’ve ________ the items you ordered, put this record in your file.