______ at the door before entering please.
#66016
A
Knocked
B
Knock
C
Knocking
D
To knock
推荐题目
If you don’t want to let us down, do believe yourself!
#59389
A
come up with ideas
B
be confident
C
be more outgoing
D
pay more attention
---Sorry for being late again.---__________here on time next time, or you’ll be punished.
#59415
A
Be
B
Being
C
To be
D
Been
—English has a large vocabulary, hasn’t it?—Yes. ________ more words and expressions and you’ll find it easier to read and communicate.
#59353
A
Know
B
Knowing
C
To know
D
Known