I want to thank my friend John, without _____ help, I wouldn't have been saved.
| A．his | B．whose | C．whom | D．Which |
Birds'singing is sometimes a warning to other birds________away.
| A．staying | B．stayed | C．stay | D．to stay |
Interest is as_______to learning as the ability to understand,even more so.
| A．vital | B．available | C．specific | D．similar |
I'm pleased to hear that you've come here to _______this matter in person.
| A．lead to | B．see to | C．refer to | D．turn to |
It's everybody's desire that every effort___________to reduce the pollution in our city.
| A．be made | B．is made | C．will bi made | D．must be made |
Mary waited for a reply, but__________came.
| A．no one | B．none | C．nothing | D．neither |