__________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