—I don't understand why you didn't go to the lecture yesterday afternoon.
—I'm so sorry.But I________my homework.
| A．had done | B．was doing | C．would do | D．am doing |
I wanted______cold meat but there was ______ left.
| A．some more ; no one | B．any more ; nothing |
| C．much more ; neither | D．some more; none |
It is global warming, rather than other factors,_____ the extreme weather.
| A．that have led to | B．which has caused | C．which are causing | D．that has led to |
_____ the crisis of economy getting more and more serious, the government is searching for ways to improve people' s life.
| A．As | B．With | C．When | D．If |
A terrible frost hit his hometown during his sleep. The next morning he got up only .____ the outside world
| A．finding; changing | B．to find ; changed |
| C．to find ; to change | D．found ; changed |
--Is it convenient to you if I pay a visit to you at 10:00 tomorrow morning?
--I' m afraid not. I _____ a lecture then.
| A．will have given | B．am about to give | C．will be giving | D．was giving |