Sitting at the back of the room but in front of some old men and women ______ a very shy girl with two bright eyes.
| A．was | B．were | C．are | D．being |
He stumbled(绊倒)on the _______ ground and fell flat on his face.
| A．undeniable | B．unfair | C．unavoidable | D．uneven |
Many students today suffer from ________ problems, since they are under too much pressure.
| A．recreation-related | B．pollution-related |
| C．stress-related | D．pollution-free |
________ energy is generated from natural resources—such as sunlight, wind, rain, tides and so on.
| A．Recyclable | B．Non-renewable |
| C．Rechargeable | D．Renewable |
Effective measures have been taken to prevent _______pollution.
| A．exhausted gas | B．exhausting gas |
| C．exhaust gas | D．exhaustion gas |
-- I’m thinking of the test tomorrow. I’m afraid I can’t pass this time.
-- ______! I’m sure you’ll make it.
| A．Go ahead | B．Good luck |
| C．No problem | D．Cheer up |