引起成人眼球突出最常见的原因是（）
A.眶内肿瘤
B.视网膜母细胞瘤
C.甲状腺相关性眼病
D.眶蜂窝织炎
E.外伤
参考答案：C
（）已是各国发展城市公共交通的重要手段之一。
A、城市轻轨；
B、地下铁道；
C、公交汽车；
D、的士。
用所给词的适当形式填空。
1. Sunday is the ______(one) day of a week.
2. June 1st is ______ Day. (child)
3. Yao Ming is a very good basketball _______. (play)
4. It's time ____________(have) lunch.
5.Thank you for _______(call) me.
6.May I ______(borrow) your ruler?
7. I spend about an hour a day ______(clean) the room.
k you for 
_______(call) me.