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__________at the door before you enter the office，or you’ll be considered impolite
#65893
A
Knocking
B
Knocked
C
Knock
D
To knock
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Tom, _________afraid of speaking in front of people. You are the best one.
#59375
A
don’t
B
not
C
doesn’t be
D
don’t be
          to the left, and you will see the railway station.
#66142
A
Turning
B
To turn
C
Turned
D
Turn
__________ the window, please. It’s cold.
#59464
A
Not open
B
Don’t open
C
Don’t close
D
Not close
    different life today is from what it was thirty years ago!
#65989
A
What a
B
How
C
How a
D
What
   me again before coming.
#66222
A
Calling
B
To call
C
Do calling
D
Call