The research is so designed that once _______ nothing can be done to change it.
题型：不详难度：来源：
The research is so designed that once _______ nothing can be done to change it. | A．begins | B．having begun | C．beginning | D．begun |
|
答案
| D |
解析
| “连词+分词”作状语，依然由句子主语与分词的关系来确定，主动关系用现在分词，被动关系用过去分词。the research 与 begin 是被动关系，用过去分词 begun。 |
举一反三
When I got back home I saw a message pinned to the door _______ “Sorry to miss you; will call later.” | A．read | B．reads | C．to read | D．reading |
|
I would love _______ to the party last night but I had to work extra hours to finish a report. | A．to go | B．to have gone | C．going | D．having gone |
|
The first textbooks _______ for teaching English as a foreign language came out in the 16th century. | A．having written | B．to be written | C．being written | D．written |
|
The purpose of new technologies is to make life easier, _______ it more difficult. | A．not make | B．not to make | C．not making | D．do not make |
|
In order to gain a bigger share in the international market, many state-run companies are striving _______ their products more competitive.| A．to make | B．making | C．to have made | D．having made |
|
最新试题
热门考点