26.—Flight MU257 _______________ . I must be off now.
—Have a nice trip.
| A．is being announced | B．has announced |
| C．was announcing | D．had been announced |
Sometimes proper answers are not far to seek ______ food safety problems.
| A．in | B．to | C．on | D．after |
In that school, English is compulsory for all students, but French and Russian are ______.
| A．special | B．regional | C． optional | D．original |
Would you like tea or coffee?
--_____, thank you. I’ve just had some water.
| A．Either | B．Both | C．Any | D．Neither |
We can never expect ____ bluer sky unless we create _____less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
—Can I use your laptop for a while?
—; any how I am not using it now.
| A．That’s OK | B．By all means | C．It doesn’t | D．Use it. |