We have found no debris（残骸）ofthe missing Malaysian airlines flight in the waters
| A．lost | B．gone | C．losing | D．passed |
These days students in some schools ______ not to use mobile phones.
| A．ask | B．asked | C．are asked | D．were asked |
—Look! There so many people in the park.
— Nobody likes to stay at home ______ Sunday morning. 
| A．in | B．on | C．at | D．to |
—Mr. King, we have finished planting all the trees.
— _________
| A．Never mind. | B．That’s too bad. | C．Don’t mention it. | D．Well done! |
—I often have hamburgers for lunch.
— You’d better. It’s bad for you ______ too much junk food.
| A．eat | B．to eat | C．eating | D．ate |
—China develops so fast.
—That’s true. It ______ a lot already.
| A．changes | B．changed | C．will change | D．has changed |