道路绿化布置的原则是( )。
A.保证交通安全
B.保证城市空气的清新
C.保证满足道路功能的要求
D.保证不污染环境
参考答案:A
解析:不能因为道路绿化而影响交通安全。
(2013·甘肃诊断测试)Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
A.to design
B.designing
C.to have been designing
D.to have designed
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