——The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?——____ my students have a try?
The old man was almost dying, terrified with darkness and loneliness. He really __________ love and care.
When will the dinner be ready? I __________.
Since we have failed many times, we should take a new approach __________ the problem.
As I __________ the little grass house in the forest, my heart beat more and more quickly.
I will have to find some other work, for I can't __________ this loud noise any more.