14. --I tried many times, but I still failed in the experiment. --Don’t be discouraged. ____ and the problem will be settled.
.Mary talked ________ she had seen the fire. But in fact she only heard of it from others.
. This is really a big problem for all of us, but I’m sure we can ________ it soon.
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.