Although the increases in airfares, most people still prefer to travel by plane.
A.although
B.still
C.to travel
D.by

I am very glad that you have done lots of progress this semester.
A.very glad
B.done
C.lots of
D.semester

At no time she could understand what he really wanted to say.
A.at
B.she could
C.what
D.really

If not his father’s help, Bill couldn’t have repaired the roof.
A.If not
B.help
C.couldn't have
D.the

I prefer to talk to people face to face rather than to talk on the phone.
A.facing them
B.in person
C.looking at them
D.seeing them

Teacher: “John, you’ve written a much better essay this time.”John: "______"A.Writing? Why?
B.Thank you. lt’s really encouraging.
C.You‘re welcome.
D.What did you say? I’m so shy.

If you need any support, you can rely on me to_____
A.set you down
B.face up to you
C.back you up
D.put you through

Halley’s Comet had its first documented sighting in 240 B.C, in China and____ it has been seen from the Earth 29 times.
A.after
B.because of
C.since then
D.that is

Before the product is put on the market, the company must_____ whether it complies with safety standards.
A.calculate
B.ask
C.argue
D.ascertain

During the starvation, we used to keep a______ of dried food in the factory.
A.conserve
B.substitute
C.reserve
D.preserve