If we want ______much cleaner world, we should reduce _______ emission of carbon dioxide.
| A．a; a | B．a; / | C．a; the | D．the; / |
_______ great picture! Who painted it?
| A．How | B．What | C．How a | D．What a |
When you ______ at a restaurant, please order just enough food.
| A．eat | B．will eat | C．ate | D．have eaten |
Mr Lin, a famous writer, _______ our school last week.
| A．visits | B．will visit | C．is visiting | D．visited |
Smile to the world, ______ the world will smile back to you.
| A．nor | B．but | C．or | D．and |
— It will be my turn. I feel a little nervous.
—______ You can make it.
| A．Congratulations! | B．Take it easy |
| C．Look out! | D．Have a good time. |