问题
No matter how frequently _____ the works of Beethoven always attract a large number of people.
A:performing
B:performed
C:to be performed
D:being performed
B:performed
C:to be performed
D:being performed
正确答案是：
同类题型
The workers will build a new railroad______ the two cities.
In college, you will discover ______ learning is about, from teacher-taught to self-learner．
Every evening after dinner, if not ___________ from work, I will spend some time walking my dog.
He said he would work it out himself, ________ ask nobody for help