SoalthoughFlemingdiscoveredpen

首页 / 高中英语 / 试题详细

So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.

A．when

B．that

C．before

D．unless

登录免费查看答案和解析

相关试题

Some of you may have finished Unit one. _________, you can go on with Unit two.

A．If you may	B．If so
C．If not	D．If you do

收藏答案/解析

At the end of the eighteenth century, masks _________ completely.

A．ban	B．had banned
C．banned	D．were banned

收藏答案/解析

We live in an age _________ more information is available with greater ease than ever before.

A．why	B．on which
C．to whom	D．when

收藏答案/解析

Before he volunteered to direct traffic, Timoteo _________ lots of jobs.

A．had had	B．has
C．have had	D．had

收藏答案/解析

—I looked after a group of fifteen French children.
—That _________ easy!

A．mustn’t be	B．mustn’t have been
C．can’t have been	D．wasn’t

收藏答案/解析

相关知识点

从属连词

推荐套卷

热门套卷

粤ICP备20024846号

声明：本网站部分内容由互联网用户自发贡献自行上传，本网站不拥有所有权，也不承担相关法律责任。
如果您发现有涉嫌版权的内容，欢迎发送邮件至：service@youtike.com 或联系QQ：267757 进行举报，一经查实，本站将立刻删除涉嫌侵权内容。