Listen! His family must be quarreling, _____?
Mike has recently caught A-H1N1. ________, he will have to be away from school for several days.
The best way to explore _______ countryside is on _______foot.
. As we watched the panda, we stood still, ______ to one another.
___the clouds, you would find the airplane in the sky easily
.— Is that the country clinic you often refer to? — Right,just the one you know my father used to work for 10 years