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【简答题】
给出以下命题： ①命题“事件A与B互斥”是“事件A与B对立”的必要不充分条件． ②“全等三角形是相似三角形”的逆命题为真； ③“矩形的两条对角线相等”的否命题为假． ④在△ABC中，“∠B=60°”是∠A，∠B，∠C三个角成等差数列的充要条件． 其中正确的命题是______（要求写出所有正确命题的序号）
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【简答题】I hope you will let me know that you can come.
【单选题】It is very important that you let your children know you feel love and concern for them．
A.
right
B.
wrong
C.
Not mentioned
【单选题】－－－ Does he study very hard at school? －－－ Yes, he studies _____.A．very indeed hardB．hard very i
A.
49. --- Does he study very hard at school? --- Yes, he studies _____. A．very indeed hard
B.
hard very indeed
C.
very hard indeed
D.
indeed very hard
【单选题】Some evidence threw doubt on ______ he had lent the money to the defender.
A.
if
B.
which
C.
that
D.
Whether
【单选题】听力原文： Hello, this is Jack in technical services. I am calling you to let you know that we were able to fix the problem with your computer. It should no longer randomly reboot. We would like to return ...
A.
To inform. on the status of the problem.
B.
To request a reply.
C.
To place an order.
D.
To repair the computer.
【单选题】He missed the train this morning ______ he got up late．
A.
or
B.
if
C.
but
D.
because
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