在执行RULESURF命令时，如选的一个对象是封闭的，则另一对象可以是（）。
A.封闭或开口
B.LINE
C.ARC
D.CIRCLE
参考答案：D
– These plants ______ lack of water.
--- You should have watered them.
A．died for
B．dead for
C．was killed
D．died
用所给单词的适当形式填空。
1. Where are these English-speaking _______ (country)?
2. I have a dog. _______ (it) name is Tony.
3. Mike is from Canada. He _______ (live) in Beijing now.
4. Look at _______ (Canada) flag. It's red and white.
5. Tim _______ (have) a little brother.
