The editor asked me to write another article for them, _____about environmental protection.
| A．any | B．one | C．that | D．each |
A new lab is being built in our school and it’ll be accessible to the students when ______ next year
| A．completing | B．being completed | C．to be completed | D．completed |
A lot of research and studies have shown that Trench oil, taken out from kitchen waste,______ the increase of cancers.
| A．appeals to | B．attends to | C．contributes to | D．devotes to |
You are saying that everyone should be equal, and this is ______ I agree.
| A．why | B．where | C．how | D．what |
Only when we saw the photos about the air crash ______ how terrible it was.
| A．we knew | B．we had known | C．did we know | D．had we known |
It rained for two weeks on end, completely ______ our holiday.
| A．to ruin | B．ruin | C．ruined | D．ruining |