The factory produces half a million pairs of shoes every year, _______80% are sold abroad.

In our country, we all get ____ by the month. I’m always the first ___ my salary every month.

All __________ people on the earth should use the natural resources wisely, or they __________ by the nature sooner or later.

tudied _____English language in London for four years, so he gets ____ goodknowledge of London

The number of students in our class ______ fifty, but a small number of them ______from the country.