—When shall we go for a picnic this Saturday or Sunday?— is OK. I’m free this weekend.A.

问题补充：

—When shall we go for a picnic, this Saturday or Sunday?

— is OK. I’m free this weekend.

A. Neither

B. All

C. Either

D. Both

答案：

A. Neither

B. All

(答案→)C. Either

D. Both

解析：考查代词。Neither两者都不；all指三者或者三者以上；either两者之一；both两者都；句意：—我们什么时候去野餐，周六还是周末？—两者中任何一个都行。我周末很空。故C正确。