---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
It’s not easy for us__________ English well.
#63157
A
study
B
to study
C
studying
D
studies
Who __________ a bike as a present?
#57471
A
wants to
B
want to
C
wants
D
want
Do you enjoy   on the beach?
#59717
A
lie
B
lying
C
lieing
D
to lieing