We were swimming in the lake _______ suddenly the storm started.
| A．until | B．while | C．when | D．before |
______of the water_____polluted. We must try to protect our environment.
| A．Two third; are | B．Two third ; is |
| C．Two thirds; are | D．Two thirds ; is |
----Pardon? I didn’t hear you just now.
---- I asked_______________________.
| A．That Michelle obama came to China in march. |
| B．How long did Michelle obama stay in China. |
| C．When did Michelle obama visit Chengdu. |
| D．Who michelle obama came to China with. |
The stones are so heavy. How _____ they _____ to the top of the building without modern machines?
| A．do; lift | B．did; lift |
| C．were; lifted | D．were; lift |
No free plastic bag in the supermarket helps to _____ white pollution.
| A．reduce | B．recycle |
| C．provide | D．produce |
–Would you like to food and clothes to the old at a home for the elderly with me?
–Of course I would. It’s very meaningful.
| A．put out | B．sell out |
| C．find out | D．give out |