This is a kind of traditional classroom teaching students are taught a lot about grammar rules.
A．where B．which C．what D．when
—Shall I turn the heating on?
—Sure, it's so cold in here. I'm freezing.
A．rarely B．naturally C．merely D．absolutely
The No. l subway, at the end of 20l4, will greatly improve the traffic conditions in Qingdao.
A．opened B．was opened C．opens D．to be opened
Air pollution is getting more and more serious, so we must take action it is too late.
A．before B．after C．until D．when
—Where is the post office?
—It's just over there, at the end of the street. You not miss it.
A．can B．must C．may D．would
is known to all is that the Diaoyu Islands have belonged to China since ancient times.
A．As B．It C．What D．That
