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【单选题】
上升到什么高度处大气压强减为地面的 75% ?设空气的温度为 0 0 C.A.
2300m
B.
2.3m
C.
230m
D.
-2300m
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举一反三
【单选题】It can't be Jack, he has gone to America.
A.
能够，表示某种能力
B.
可以，表示允许
C.
可能，表示猜测
D.
肯定，表示事实
【单选题】—This pair of shoes belong to Jack. He likes this kind very much. —It __ be his. It's too large for him. [ ]
A.
can; can't
B.
may; needn't
C.
must; mustn't
D.
must; can't
【简答题】The ancestors of the English are , while the Scots, Welsh and Irish the .
【简答题】Fill in the blanks 1. For those with family members far away, the cellphone is very important in staying ________. (connect). 2. The pilot asked all the passengers on board to remain ______(seat) as t...
【单选题】It can't be Jack. He has gone to America.
A.
可能，表示猜测
B.
能够，表示能力
C.
可以，表示允许
D.
肯定，表示事实
【单选题】听力原文：Jack, thank you for inviting us to dinner in your house tomorrow. But I'm extremely sorry that my wife and I won't be able to make it. The speaker feels sorry because______.
A.
he can't attend tomorrow's dinner.
B.
his wife can't attend tomorrow's dinner.
C.
the couple can't attend tomorrow's dinner.
D.
the couple would be unable to cook the dinner.
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