With the help of high technology, more and more new substances ______ in the pas
题型：不详难度：来源：
With the help of high technology, more and more new substances ______ in the past 10 years.| A．discovered | B．have discovered | | C．had been discovered | D．have been discovered |
|
答案
| D |
解析
| 考查时态。in the past+时间段，后用现在完成时态。句意：在先进技术的帮助下，在这十年间越来越多的新物质被发现。故选D。 |
举一反三
Mary is giving me English lessons my teaching her Chinese.| A．exchange for | B．exchange | C．in exchange for | D．to exchange for |
|
they speak their own kind of English.| A．Down under | B．Under down | C．Down below | D．Above down |
|
In buses, all of us _________ thieves.| A．keep an eye out for | B．are keep an eye out for | | C．are kept an out for | D．keep eye out for |
|
his contribution to botany, Joseph Banks had a flower _______him.| A．As a reward for; named after | B．As a reward; named | | C．As a reward for; name after | D．Reward for; take its name from |
|
Not all ads are used to promote a product or to increase a company’s profits. Which is the following statement correct?| A．All the ads are used to promote a product or to increase a company’s profits. | | B．Neither of ads are used to promote a product or to increase a company’s profits. | | C．Some of ads are used to promote a product or to increase a company’s profits. | | D．None of ads are used to promote a product or to increase a company’s profits. |
|
最新试题
热门考点