Large quantities of water ________ for cooling purpose in the only one of the plants that ________ steel in the city.

A．has been needed; produce

B．are needed; produces

C．is needed; produces

D．have been needed；produce

Large quantities of fish _______ in the river in the past few days.

Large quantities of fish _______ in the river in the past few days.

A. were caught　 B. was caught　 C. has been caught　 D. have been caught

Large quantities of oil      in a place near my hometown recently.

1. A.
   has discovered
2. B.
   have discovered
3. C.
   has been discovered
4. D.
   have been discovered