Supermarkets offer a big _______ of items.

A．Supermarkets need more clerks than other stores

B．In supermarkets goods are placed on closed shelves

C．The customers prefer supermarkets to other kinds of stores

D．The customers pay any clerk they meet for what they have bought in supermarkets

A.guess

B.imagine

C.estimate

D.evaluate

A. which

B. that

C. when

D. where

A) furnish

B) induce

C) facilitate

D) allocate

A. to go

B. going

C. gone to

D. have gone

A.A.has been continuing

B.B.might have continued

C.C.is continuing

D.D.have been continuing