Whatever is left over may be put into the refrigerator, it will keep for two or three weeks.
A when
B. which
C. where
D. while
This is a kind of traditional classroom teachingstudents 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 |