—What’s that terrible noise over there?

—The workers ______ the boxes from the back of the truck.

—What’s that terrible noise over there?

—The workers ______ the boxes from the back of the truck.

A. have carried        B. are carrying       C. carry                         D. will carry

—What’s that terrible noise over there?

—The workers ______ the boxes from the back of the truck.

A. have carried　　　　　　 B. are carrying　　 C. carry　　　 　　 D. will carry

 —What’s that terrible noise over there?

—The workers ______ the boxes from the back of the truck.

A. have carried                                 B. are carrying     

C. carry                                          D. will carry

—What’s that terrible noise over there?
—The workers ______ the boxes from the back of the truck.