---May I speak to Mr. Smith? ---Sorry, he . Can I take a message?
#53437
A
sleeps
B
is sleeping
C
sleep
D
sleeping
推荐题目
He wants to be a volunteer teacher in western China when he _______.
#51956
A
takes up
B
puts up
C
grows up
D
makes up
I looked up and noticed a snake ______ its way up the tree to catch its breakfast.
#53466
A
to wind
B
wind
C
winding
D
wound
