The argument remains extremely heated ______ it is worthwhile for China to open its door to foreign cars.

   A. that         B. which       C. if            D. whether

The argument remains extremely heated _____ it is worthwhile for China to open its door to foreign cars.

1. A.
   that
2. B.
   which
3. C.
   if
4. D.
   whether

The argument remains extremely heated ____it is worthwhile for China to open its door to foreign cars.

  A. that                    B. which             C. if                    D. whether

The argument remains extremely heated _____ it is worthwhile for China to open its door to foreign cars.

[　　]

A．that　　　B．which

C．if　　　　D．whether