The silence of the library ________ only by the sound of pages being turned over.

A. hasn't cleaned B. didn't clean

C. wasn't cleaned D. hasn't been cleaned

A. has been questioned B. is being questioned

C. is questioning D. has questioned

A. had gone B. could have gone C. would go D. went

A.If I realized B. Had I realized

C.Did I have realized that D. As I realized

A. is appointed B. will be appointed C. be appointed D. has been appointed

A. comes B. will come C. come D. may come

A. put on B. puts on C. to put D. putting on

A. that B. as

C. which D. what

A. that B. so that

C. so D. when

A. so diligent B. such diligent

C. so much diligent D. such very diligent