--- This dress was last year's style.
--- I think it still looks perfect ________ it has gone out this year.

— Will we have dinner at the Hope Restaurant?
— Maybe. We’ll go there if the show ____ before 6.p.m. But I don’t know if there____ any free tables then.

I don't know________ they have passed the exam.

David, get up early, _______ you'll not catch the early bus.

Food safety is important. Rules ______ to stop people from food pollution.

Sun Li acted _______ well ______ some people mistook her for a real queen.

--- Would you please tell me_____ the timetable (时间) has changed?
--- Because the students should have a rest at noon.
A.  if             B. when           C. why

Not everyone knows_____they want to be.

--______ do you stay up late?
-- Never. I always go to bed early.

下列三组大写字母中由两笔写成的是_______组。
A. DMW         B. PRQ     C. ENT