A
1.at 该为in
去掉more
clear 改为 clearly 修饰explain
去掉 back 因为有return
need 后加to ,need to do sth
去掉to ,短语make sb do sth
have 换成be,结构 there is going to be.
A
1.at 该为in
去掉more
clear 改为 clearly 修饰explain
去掉 back 因为有return
need 后加to ,need to do sth
去掉to ,短语make sb do sth
have 换成be,结构 there is going to be.