—How far can you run without stopping?
—________.I've never tried.
A.Don't mention it | B.That's all right |
C.I have no idea | D.Go ahead |
We can never expect ____ bluer sky unless we create _____less polluted world.
A.a; a | B.a; the | C.the; a | D.the; the |
Would you like tea or coffee?
--_____, thank you. I’ve just had some water.
A.Either | B.Both | C.Any | D.Neither |
In that school, English is compulsory for all students, but French and Russian are ______.
A.special | B.regional | C. optional | D.original |
Sometimes proper answers are not far to seek ______ food safety problems.
A.in | B.to | C.on | D.after |
To get a better grade, you should ______ the notes again before the test.
A.go over | B.get over |
C.turn over | D.take over |