We waited _______ for the bus.
| A．long time | B．a long time | C．the long time | D．some long time |
--- When shall we restart our project?
---Not until we _____ our plan.
| A．will finish | B．are finishing | C．are to finish | D．have finished |
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 |