Question

Now a lot of new technology developed by scientists will ________ the quality of rice and wheat．

1. A.
   applied to improve
2. B.
   be applied to improving
3. C.
   apply to improve
4. D.
   apply to improving

Answer 1

B
apply…to…“把……运用到……”，to为介词，后面要跟动名词，根据句子的意思需要用被动语态。