一般地，小学儿童在（）岁时视敏度最好。
A.8
B.9
C.10
D.11
参考答案：C
从东西半球看，我国位于______，从南北半球看，我国位于______．
—_______?
—She's staying at home. [ ]
A. Where is she
B. What is she doing this weekend
C. Where are you going
D. How long is Lily staying at home
