“黄河之水天上来，奔流到海不复回”这“天上”应指[ ]
A．青藏高原
B．天山
C．黄土高原
D．贺兰山
答案：A
Mr. Smith works as a government official now, but he ____________ in a middle school for 5 years.
A．has worked
B．worked
C．had worked
D．had been working
下列气候类型中，在亚洲没有分布的是：[ ]
A．地中海气候
B．温带海洋性气候
C．亚热带季风气候
D．热带雨林气候
