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【題目】(2017·北京) Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.

【題目】-Where is my suitcase？

【題目】Because of the Great Lakes, they learned, Canada has more fresh water than in the world. In fact, it has one-third of the world's total fresh water, and much of it is in the Great Lakes.

【題目】Simon put up a picture of Michael Jordan beside the bed to keep himself_______of his own dreams．

【題目】Water had also appeared on other planets like Mars but, the earth, it had disappeared later. It was not immediately obvious that water was to be fundamental to the development of life.

【題目】It exploded loudly with fire and rock. They were to produce carbon dioxide, nitrogen, water vapour and other gases, which were to make the earth's atmosphere.