单项选择题

There is no doubt _____ you will pass the exam this time. You have worked so hard in the past months.

A．whether　
B．that　
C．if　
D．what
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单项选择题
If anyone happens to drop in while I am out, _____ him or her leave a message.
A．have　
B．get　
C．ask　
D．tell
单项选择题
Can you _____ the difference _____ the two phrases
A．tell, between　
B．speak, from　
C．say, of　　
D．talk, between
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