If people keep polluting the rivers, no fish there will survive ______. 

—How do you__________ we go to Beijing for our holidays? —I think we’d better fly there. It’s much more comfortable.

When he realized the police had seen him, the man______the exit as quickly as possible.

—Do you need any help, Lucy?—Yes, The job is ________ I could do myself. 

 To get a better grade, you should ______ the notes again before the test.