查人人中国名人网中医治疗学:请问以下2句哪句正确
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/11 05:24:18
A: if looking at the signature a second time,you'll know who it is。
B： when you look at the signature a second time,you'll know who it is。
其中有一个是正确的
B： when you look at the signature a second time,you'll know who it is。
其中有一个是正确的
A: if looking at the signature a second time,you'll know who it is。应该是 Looking at the signature a second time,you'll know who it is。或者A: if you look at the signature a second time,you'll know who it is。
B,蒙的
B
A是错误
If条件状语从句中，If后面只能跟一般现在时，所以不能用LOOKING