单选题
Up to now not only the students but also their teacher ______ the football club.
A. joined B. has joined C. have joined D. joins
【正确答案】
B
【答案解析】本题考查动词的用法。固定句型为：not only...but also...，谓语实行就近原则，用单数；时间状语为up to now，用完成时。该句意为：到目前为止，不仅学生们，而且老师们也加入了足球俱乐部。