A. 单项选择题：
1.We are going to have a picnic ne xt week . Will you us ?
A. take part in B. go in for C. join D. join in
2.T he box is what I saw in the shop .
A. some as B. the same like C. the same that D. the same as
3.The doctor told me to take the medicine .
A. every four hours B. four hours each
C. four each hour D. every fourth hours
