幼儿园（），是向幼儿进行体、智、德、美全面发展的教育的基本途径。
A.一日生活中的各种活动
B.专门的学习活动
C.各领域的学习活动
参考答案：A
The flowers were so lovely that they ______ in no time. [ ]
A. sold
B. were sold
C. had been sold
D. would sell
水泥污染防治的主要措施有哪些？
