—Is this pair of shoes Jim's? —It _his.They're too big for him.[ ]A. might be B. can'

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• —You see, a man is cutting a tree on the moon. —It _________ be true. The teacher says there is no a
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• This building is too old and dangerous.It should ___dowm[ ]A. to pullB. pullC. is pulled D. be pulle
• —I was told to be here before 6:00 p.m.— Oh, you . I felt sorry for you that we've changed the
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• You ______ jump onto a bus while it is still moving. It is too dangerous. [ ]A. can B. must C. can&#
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• 句型转换1. I like playing football. (否定句)I ______________ playing football.2. I wanted soup for supper.
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• 一般地说，在输入到一个营养级的能量中，只有的能量能流入下一个营养级。-八年级生物
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• 从物质循环的观点看，生物体内碳元素的最终来源是[]A．食物所含有机物中的碳B．非生物界中的碳酸盐C．大气中的二氧化碳D．生态系统中的生产者-八年级生物
• Must I take the medicine every day?-No, you __________.[ ]A. mustB. mustn'tC. needn'tD. ca
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• 生态系统中的能量流动伴随着__________。-八年级生物
• He ______more fruit and vegetables instead of meat.[ ]A. need to eat B. needs to eatC. need eating D
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• Tony hasn’t come to school yet. He __________ be ill or has something wrong.[ ]A. mayB. willC. needD
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• —Where is Tom? —He didn't come to school today.I think hebe ill. [ ]A. has to B. shouldC. mayD.
• 碳循环中，能使二氧化碳进入生物体内，又能将其释放到大气中的是[]A．生产者B．消费者C．分解者D．以上都可以-八年级生物
• 森林生态系统往往降雨较多，其主要原因是[]A．蒸腾作用使大气湿度增加B．光合作用旺盛，利用水分多C．呼吸作用较弱，产生水分少D．蒸腾作用使大气湿度减少-八年级生物
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• 由于“赤潮”的影响，一条4千克重的草食性海洋鱼死亡，食物利用率按20%计算，该杂食鱼从出生到死亡，共需海洋植物千克。-七年级生物
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