Scientists say it will be five or six years _____ it is possible to test this me
题型：不详难度：来源：
Scientists say it will be five or six years _____ it is possible to test this medicine on human patients. | A．before | B．that | C．since | D．when |
|
答案
| A |
解析
| 此题考查时间状语从句的引导词。由It + be + 时间段 +before 从句“要过多久才…”可知，此处用before 。 |
举一反三
“All is necessary for the triumph of the evil is good men do nothing．” Edmund Burke said．| A．what; that | B．that; why | C．what; when | D．that; that |
|
I usually take something to read when I travel by train I feel bored.| A．in case | B．so that | C．as if | D．even though |
|
We understand _______small changes to our land can have a big impact upon our environment __________ as we know is vulnerable enough.| A．what; which | B．what; where | C．how; where | D．how; which |
|
I accept that he is not perfect, I do actually like the person.| A．While | B．Since | C．Before | D．Unless |
|
Few people know the fact ______ was not until 1936 that basketball became a regular part of the Olympic Games.| A．it that | B．that it | C．that | D．it |
|
最新试题
热门考点