12月份有31天，是4个星期零3天．______．
31÷7=4…3；
答：8月份有4个星期零3天；
故答案为：√．
32. ---I can’t see words on the blackboard clearly .
---Why, your eyes need _____ .Perhaps you need ______ glasses .
A．to examine; wear
B．to examine; to wear
C．to be examined; to wear
D．examining ; wearing
一条直径为2厘米的半圆，它的周长是[ ]
A．6.28厘米
B．3.14厘米
C．5.14厘米
