Weather experts advise us out if PM2.5 levels are above 500.
A．not go B．not going
C．don’t go D．not to go
Unemployment is rising and prices are increasing; , the economy is in trouble.
A．in terms of B．in a nutshell
C．as a result of D．at a time
Once considered a of western culture, Valentine’s Day is becoming popular in China.
A．figure B．record C．sign D．symbol
-Were you late for the film?
-Very late. Half of it by the time we the cinema.
A．was shown; reached
B．had been shown; reached
C．was shown; had reached
D．had been shown; had reached
I didn’t think he actually got what I said he said that he had understood it completely.
A．unless B．since C．until D．although
The forest guards often find campfires that have not been completely.
A．brought down B．put out
C．cut down D．given out
