It ________ have been her to leave her child alone and do whatever she wanted. She isn't such a person.

—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?     —______ my students have a try?

When he was there, he ______ go to that coffee shop at the corner after work every day.

—You must have met him the other day.　　—Oh, no, I ________.

—Do you think the rain will affect the football match?—The players are used to such rainy weather, so it ______ make any difference to them.