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Don’t disturb me. I_______ letters all morning and have written ten so far.
#100860
A
have written
B
am writing
C
was writing
D
have been writing
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Hurry up! Flight 4406        off at 18:40.
#101551
A
takes
B
took
C
will be taken
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has taken
— The room is so dirty. _____ we clean it ?— Of course.  
#104882
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Remember me to your parents when you _____ them.
#99270
A
are calling
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call
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(2013·高考陕西卷)On Monday mornings it usually________me an hour to drive to work although the actual distance is only 20 miles.
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A
takes　　　　　　　　　
B
is taking
C
took
D
will take
 Customers are asked to make sure that they______ the right change (零钱) before leaving the shop.
#103123
A
will give
B
will be given
C
have given
D
have been given