世界各国合作经验表明,()领域的合作是农民普遍需要和乐意接受的。
A.加工
B.生产
C.供销
D.金融
参考答案:A, C, D
The socks were too small, and it was only by()them that he managed to get them on.
A.spreading
B.extending
C.lengthening
D.stretching
教师对学生的观察主要是观察学生的学习性行为,非学习性行为不在观察之列。