The queen will visit the town in May she will open the new hospital.A. whenB. thenC. whi

问题补充：

The queen will visit the town in May, she will open the new hospital.

A. when

B. then

C. while

D. but

答案：

A. when

B. then

C. while

D. but

解析：

本题为连词用法的考查，句子无承接和转折的意思，故排除B、D，而while更强调两个动作同时发生，所以也不符合题意。