______ your hand over your mouth when you cough.
#66193
A
Put
B
Putting
C
To put
D
To be putting
推荐题目
—Please _______to return my book by Friday. I'll use it on Saturday.—No, problem. I'll finish reading it on Thursday.
#59466
A
don't forget
B
not to forget
C
not forget
D
forget not to
—I’m leaving now.—______ you turn off the lights and the computer.
#59419
A
To make sure
B
Make sure
C
Made sure
D
Making sure
______ yourself with positive people, and you will keep focused on what you can do instead of what you can’t.
#66067
A
Surround
B
Surrounding
C
Surrounded
D
Have surrounded