____________you swim —Yes，but I’m not a good swimmer.

_________ happened to be no one in the building when the fire broke out[ ]

My parents are unhappy today I think Ishall think of ways to ______.

Fully _____ in looking after three children at home, she no longer has time to enjoy various activities in the club.

There is _________as a free dinner in this world . As the saying goes,“No pains, no gains.”