________ at the door before you enter my room, please.
#66075
A
Knock
B
Knocking
C
Knocked
D
To knock
推荐题目
——________ late for school again, Tom!——Sorry, I promise I _________.
#59444
A
Don’t, will
B
Don’t be, won’t
C
Don’t be, don’t
D
Don’t, won’t