问题补充:
My sister has never played tennis before. This is the first time she to play.
A. is trying
B. was trying
C. has tried
D. had tried
答案:
A. is trying
B. was trying
(答案→)C. has tried
D. had tried
解析:考查固定句式中的时态。本题的固定句式为:It/This is/was the序数词 time that从句,句意:是某人第几次做某事的时候了。如果前面是is,后面就使用现在完成时;如果前面是was,后面就是过去完成时。本题句意:我的姐姐以前从来没有打过网球,这是她第一次打。前面使用了is,故使用现在完成时。故C正确。