________ at the door before you enter my room, please.
#66075
A
Knock
B
Knocking
C
Knocked
D
To knock
推荐题目
—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
—I’m leaving now.— ______ you turn off the lights.
#59488
A
To make sure
B
Make sure
C
Made sure
D
Making sure
——________ 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
The smoggy weather has made us realize terrible problems we are laced with．
#66025
A
how
B
what
C
that
D
which