Hikingby oneself can be fun and good for health It may also be good forbuilding

Our car ___________ on the way to the valley, so we had to wait for rescue.

______ are you able to type the English words– About forty to fifty words a minute.

A number of tests have been conducted to _______ that these drugs have no side effects.

The most serious problem we are facing now is how to ______ all the pollution.