—May I open the window to let in some fresh air?
—___________
| A．Come on | B．Take care | C．Go ahead! | D．Hold on! |
. Doing your homework is a sure way to improve your test scores, and this is especially true ______ it comes to classroom tests.
| A．when | B．since | C．before | D．after |
No sooner ______ started to shine ______ it was clouded over again.
| A．the sun had; than | B．had the sun; than | C．had the sun; when | D．the sun had; when |
Many teenagers in China are accustomed to ______ after, ______ for granted everything their parents do.
| A．being looked; taking | B．looked; taking | C．being looked; took | D．looking; taking |
It ______ to be seen whether Yao Ming will be fit enough to play in the new season.
| A．stays | B．keeps | C．appears | D．remains |
Premier Wen Jiabao started his three-day official visit to South Korea, ______ was aimed at increasing cooperation and good neighborliness.
| A．that | B．where | C．which | D．as |