There are some health problems that, when ___in time, can become bagger ones later on.
Her father gave her the ___ of going on to college or starting to work.
He soon found himself his new co-workers.
is a good chance that I'I1 finish the work tomorrow.
Access the mountain-town is often difficult because of the bad roads.
Once out of the earth’s gravity, the astronaut is by the problem of weightlessness.