________ in the climate and soil depends in a way on the experiment ________ carried out by the experts.

1. A.
   That grows best; has been
2. B.
   What grows best; being
3. C.
   How does it grow best; is to be
4. D.
   What does it grow best; was

_____ in the climate and soil depends in a way on the experiment _____ carried out by the experts.

A．That grows best; has been                     B．What grows best; being

C．How it grows best; is to be                   D．What it grows best; was

________ in the climate and soil depends in a way on the experiment ________ carried out by the experts.

[　　]

A．What grows best; being

B．How does it grow best; is to be

C．What does it grow best; was

D．That grows best; has been

________ in the climate and soil depends in a way on the experiment ________ carried out by the experts.

A. That grows best: has been　　　　　　   B. What grows best; being

C. How does it grow best; is to be　　　　　　  D. What does it grow best; was

A. That grows best: has been　　　　　　   B. What grows best; being

C. How does it grow best; is to be　　　　　　  D. What does it grow best; was