Give them a hand this time and I am sure they will offer theirs ______ in the future.
| A．by turns | B．in turn |
| C．at turn | D．in return |
He stayed up too late every night,______ to catch up with his classmates.
| A．Having determined | B．being determined |
| C．determined | D．to determine |
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 |