__________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
—_______ listen to music in the classroom, Peter. —Sorry, I won’t, Mrs. Black.
#65892
A
Doesn’t
B
Don’t
C
Didn’t
D
Can’t
, and the problem will be worked out.
#66110
A
If you have a bit more effort
B
Having a little effort
C
A bit more effort
D
There being a little effort
_____different life today is ________what it was 30 years ago
#65994
A
What; from
B
How; from
C
How; with
D
What; with
You can’t imagine ______ when they received these nice Christmas presents.
#65973
A
how they were excited
B
how excited they were
C
how excited were they
D
they were how excited
—Sorry for being late for the party.—________ earlier next time, will you?
#65957
A
Coming
B
To come
C
Having come
D
Come