Thank you for all your hard work last we

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问题选择题

Thank you for all your hard work last week. I don’t think we ______ it without you.[ ]

A. could have managed

B. can manage

C. can have managed

D. could manage

答案

答案：A

选择题

下列哪项不属于生态系统的碳循环的环节（　　）

A．大气中二氧化碳通过绿色植物的光合作用进入到植物体内

B．动物通过直接或间接地摄食植物使碳进入到动物体内

C．所有生物的呼吸作用和工业排放，使大气中二氧化碳得到补充

D．大雨使二氧化碳越来越多

选择题

—Could you tell me _______? I must find him.

—Sorry. I don't know. But he was here just now. [ ]

A. where Tom was

B. where has Tom gone

C. where Tom is

D. where can I find Tom