There are a lot of computers in the lab,and they need professional to make sure they can be in a good state.
#80920
A
operation
B
maintenance
C
service
D
advice
推荐题目
Among so many people at the party, I _______ John, one of my classmates after 20 years.
#64127
A
looked up
B
picked out
C
took up
D
brought out
When the powerful earthquake struck and all lights went out all of a sudden. It seemed _______ the world was at an end.
#66904
A
as if
B
even if
C
such as
D
like that
I want to ________ a question to the chairman but in a moment I lost my nerve.
#70471
A
arrive
B
reply
C
rise
D
raise
He slowed the bleeding by pressure to the wounds until the ambulance arrived．
#67053
A
assessing
B
approving
C
applying
D
appointing
It is not easy to learn English well but if you ______, you will succeed in the end.
#68010
A
hang up
B
hang about
C
hang on
D
hang around