For weeks, the street hasn’t been cleaned by the cleaners, _______makes it very dirty.

       A. who                         B. which                      C. that                   D. this

For weeks the street hasn't been cleaned by the cleaners, _____ makes it very dirty.

A. who　　　 　　　　　　　 B. which

C. that　　　 　　　　　　　　 D. this

For weeks, the street hasn’t been cleaned by the cleaners, _______ makes it very dirty.

1. A.
   who
2. B.
   which
3. C.
   that
4. D.
   this

For weeks the street hasn't been cleaned by the cleaners, _____ makes it very dirty．

A．who           B．which       C．that           D．this