.
As we all know, the advantage _______ is good for students’ self-improvement.
| A．they take of the library | B．they take the library |
| C．they take to the library | D．they take the library of |
Exercise is _______ as any other to lose unwanted weight.
| A．such useful a way | B．so useful a way |
| C．as a useful way | D．as useful a way |
______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 |
Not until _____,_______the diffiult problem.
| A．did he return;we settled | B．he returned;we settled |
| C．did he return,did we settle | D．he returned;did we settle. |
She started singing to the baby and was ____ with a smile.
| A．awarded | B．rewarded | C．prized | D．valued |
I did not accept any of the many offerings,because I found_____satisfactory.
| A．all of them not | B．none of them | C．neither of them | D．either of them |