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【单选题】
在WINDOWS中，对话框是一种特殊的窗口，但一般的窗口可以移动和改变大小，而对话框【】A.
既不能移动，也不能改变大小
B.
仅可以移动，不能改变大小
C.
仅可以改变大小，不能移动
D.
既能移动，也能改变大小
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举一反三
【简答题】Fill in the blanks with the proper form of modal verbs.
【单选题】what a pity! I missed meeting my boss at the airport because my car was______ in the traffic jam.
A.
broken up
B.
kept back
C.
held up
D.
kept up
【单选题】I _______ my boss at three this afternoon.
A.
shall be picking up
B.
shall be picked
C.
shall have been picking up
D.
shall have picked up
【简答题】Fill the modal verbs in the following table according to the meanings. Meanings affirmative Negative Ability Certainty and possibility Obligation and compulsion Requests, orders, offers, permission
【简答题】Fill in the blanks with proper modal verbs.
【单选题】What a pity! I missed meeting my boss at the airport because my car was _____ in the traffic jam.
A.
broken up
B.
kept back
C.
held up
D.
kept on
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