游客
题文

A new technique ____ out, the yields (收成) increased by 20% .

A.having working B.having been working
C.has worked D.had been worked
科目 英语   题型 单选题   难度 容易
知识点: 谓语
登录免费查看答案和解析
相关试题

It was ________ surprise that my first teacher, already 90, was still living and in ______good health.

A.the; a B./; a C.a; / D.a; the

—I think you should phone Jenny and say sorry to her.
—_______.It was her fault.

A.No way B.Not possible C.No chance D.Not at all

——Did you know any Chinese before you arrived in Beijing?
——Never ________it, actually.

A.had I learned B.have I learned C.I have learned D.I had learned

He was disappointed to find his suggestions ________.

A.been turned down B.turned down C.to be turned down D.to turn down

He is recovering now. is no need to call in a doctor.

A.It B.There C.This D.That

Copyright ©2020-2025 优题课 youtike.com 版权所有

粤ICP备20024846号