哮喘患儿的家庭应注意不养小动物，忌绒毛玩具地毯草席等是因这些物品可能引起（）.
A、空气污染
B、肝炎
C、过敏
D、窒息
参考答案：C
The project, ______ at the end of 2008, expanded the city’s telephone network to cover 1,000,000 users.
A．accomplished
B．being accomplished
C．to be accomplished
D．having been accomplished
简述观光农业的基本功能。
