Not only are students in China suffering from this problem, but kids in the United States are also ________ heavy school bags..
| A．kept up with | B．come down with |
| C．ended up with | D．fed up with |
Great changes have taken place in that school.It is no longer______it was 20 years ago,______it was so poorly equipped.
| A．what;when | B．that;which | C．what;which | D．which;that |
—Could I ask you a rather personal question?
--Sure,_______.
| A．pardon me | B．go ahead | C．good idea | D．forget it |
.It is warned that no one is permitted______the lab after 10:00 p.m.
| A．enter | B．to entering | C．to enter | D．entering |
______has helped to save the drowning boy is worth praising.
| A．Who | B．The one | C．Anyone | D．Whoever |
.She listened with a________expression on her face,which suggested she didn’t completely understand.
| A．puzzling | B．frightened | C．frightening | D．puzzled |