ales must come up for air after several minutes, _______ a few can stay underwater for an hour or more.

The haze or smog was so serious that the winter running _________.Some students complained as they ran

I’m sorry, I should not have been so rude to you. — You _______ your temper but that’s OK..

I’m afraid I can’t attend your wedding ceremony, but thanks for the invitation_______

I wonder if I could use your mobilephone.— ____.