I see no reason why they shouldn’t go on playing for another four or five years, __________they are fit.

I clean my room once a week, and the job _____ me two hours．

None of us expected Mr．Johnson to _____ at the party．We thought he was still abroad．

The little girl ________ to be a good singer if she gets good training in a music school.

The space walk will last six and a half hours and the repair of Discovery is expected to __________ a little more than an hour.