The first paragraph focuses on which aspect of fog?
A.its beauty
B.its dangers
C.its composition
D.its causes

Please _______your cigarette. I am going to get choked.
A.blow out
B.put aside
C.put out
D.cut down

Slang can be defined as a set of codes used in ______ language.
A.uneducated
B.unfamiliar
C.informative
D.informal

_______(37)
A.provided
B.distributed
C.delivered
D.given

_______(38)
A.lie
B.exist
C.show
D.lay

_______(41)
A.growing
B.developing
C.poverty
D.miserable

_______(42)
A.discharging
B.charged
C.recharged
D.discharged

-Teacher: "Jon, you've written a much better essay this time." - John: " _______"
A.You're welcome.
B.Thank you. It's really encouraging.
C.Writing? Why?
D.What did you say? I'm so shy.

Too many factories dispose _______their waste by pumping it into rivers and the sea.
A.away
B.of
C.out
D.off

_______of popular expressions in our language have interesting backgrounds.
A.A sum
B.A large number
C.A great deal
D.The large number