单选题 Although biological methods of pest control are now available to committed organic gardeners, there are few of us who never need to______tile use of chemicals.

A、 resort to
B、 refer to
C、 size up
D、 pick up

【正确答案】 A

【答案解析】解析：resort to“依靠，求助于”；refer to“参考，涉及，指的是”；size up“估计”；pick up“拾起，捡起估量”。根据句意，本题答案为A。