If the air stream meets with no obstruction when a sound is pronounced, it is a（n)A．voiced

If there __________ no air, people would die.A、wereB、isC、beD、been

______ if he is willing to fit in with the plans of our group.A．There is no objection on h

The passage suggests that when jet streams interact with continents with few mountain rang

The passage suggests that when jet streams interact with continents with few mountain rang

In what condition does a typhoon begin？A．When the warmer air meets with the cooler air.B．W

Helen ______ with her class if she had been able to meet all of the course requirements in