题目内容
About _______ gene-targeting drugs are already in testing pipeline. It won’t be long ______ they are put into effect.
|
A．two dozen; before |
B．two dozens; that |
|
C．two dozens of; before |
D．dozens; that |
【答案】
A
【解析】略
练习册系列答案
相关题目
About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.
| A．two dozen; before | B．two dozens; that | C．two dozens of; before | D．dozens; that |