（)! That fire is dangerous.A. To stopB. StoppingC. Stop

The thermostatic valve has a throttling action, that is to say the valve can .A.stop the r

According to the news item, what make（s)the major bush fire spread？A．Two large fires that

It is urgent that immediate measures______to stop the situation.A．are takenB．were takenC．b

Teachers warn students that （) to computer games is dangerous.A、likingB、addictionC、prefe

It is certain that men will never stop _____ new energy sources to power their gr

Escaping a fire is a serious matter. Knowing what to do before a fire breaks out can save