游客
题文

It is believed that _____ European scientist invented _______.

A.an; a television B.a; a television
C.an; the television D.a; the television
科目 英语   题型 单选题   难度 中等
登录免费查看答案和解析

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

粤ICP备20024846号