.--- An explosion at a coal mine killed at least 62 workers and left another 13 missing.
--- Yes, _________ news came as ________ shock to us all.
| A．the;the | B．/;/ | C．/;a | D．the;a |
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 |