Nowadays there are still a number of students school at various grades due to a lack of money in some poorer areas.
| A．leaving out | B．making out | C．letting out | D．dropping out |
________ 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 |
It worried her a bit ____ her hair was turning grey.
| A．while | B．that | C．if | D．for |
_______you come or not is up to you.
| A．What | B．If | C．Why | D．Whether |
_________is going to do the job will be decided by the Party committee.
| A．That | B．Why | C．How | D．Who |