—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?

 I’d rather you ___ anything about it for the time being.

Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every driver _______obey in this city.

It’s nearly 7 o’clock. Helen _______ come, but let’s wait for her for another 5 to 7 minutes.

If he________his legs in the last training，he________the coming World Cup，which he has been longing to compete in.