Wind power is an ancient source of energy ____wemay return in the near future.

There __________ a library and two reading rooms in the school.

Is there any present for me? — Of course .This necklace _____ you. [ ]

what I happened to have met Mark at the partylast week．—If my memory serves me correctly, you two ______ eachother for almost ten years．

Could you please tell me something about the two ________ _________. They are exchange students of No. 1 Middle School.