______known to us,_______ increasing number of students are buried in their studies.
| A．What is;a | B．It is;the | C．As it is;the | D．As is;an |
There are a lot of computers in the lab,and they need professional __________ to make sure they can be in a good state.
| A．operation | B．maintenance | C．service | D．advice |
He is __________ every day.He has never been late for school.
| A．busy | B．diligent | C．careful | D．punctual |
Universities have to provide student __________ for first-year students.
| A．adjustment | B．qualification | C．commitment | D．accommodation |
The space walk will last six and a half hours and the repair of Discovery is expected to __________ a little more than an hour.
| A．take | B．cost | C．spend | D．adjust |
I really don’t want a bigger house— I’m __________ with what I’ve got.
| A．satisfying | B．satisfied | C．satisfactory | D．satisfaction |