__________at the door before you enter the office，or you’ll be considered impolite
#65893
A
Knocking
B
Knocked
C
Knock
D
To knock
推荐题目
_____different life today is ________what it was 30 years ago
#65994
A
What; from
B
How; from
C
How; with
D
What; with
______ important for us ________English well.
#59423
A
It’s, to learn
B
This is, to learn
C
It’s, learning
D
This is, learning
__________at the door before you enter the office，or you’ll be considered impolite
#65893
A
Knocking
B
Knocked
C
Knock
D
To knock
— Kate, ________ forget to give my best wishes to your uncle. — Thanks, I will.
#59381
A
doesn’t
B
don’t
C
won’t
D
can’t