PTA治疗如下哪一部位的动脉硬化性狭窄成功率最高（）
A.髂动脉
B.股动脉
C.腘动脉
D.锁骨下动脉
E.腋动脉
参考答案：A
—Tom is never late for work. Why is he absent today?
—Something _____ to him.[ ]
A. must happen
B. should have happened
C. could have happened
D. must have happened
根据汉语，填入恰当的内容完成句子，每空一词。
1. 这儿的天气相当好,我们此刻正在街上散步.
The weather here is _______ _______. We ______ ______ in the street now.
2. 他们在风中奔跑着.
They are _______ _____ _____ ______.
3. 公园里有许多老人在跳舞.
There _______ ______ ______ old people _______ in the park.
4. 下雪天他常做什么?
________ does he do ________ _____ ______?
5. 我们很惊讶,他们竟然能在雨中打篮球.
_______ ______ ______ can play basketball _____ the rain.
_ in the street now.