Q1: Many students review so that they may not gorget <font color="#800080"><i>_a_</i></font> they learned.<br/><br/> What do you think about the above sentence. Do I have to put <font color="#ff1493"><i>what</i></font> in the blank <font color="#800080"> _</font><u><font color="#800080">a</font><font color="#800080"> </font>? Is it omittable or not?<br/><br/>Q2: You should <font color="#ff0000">not</font> touch him <font color="#ff1493">lest</font> you <font color="#ff1493">should</font> be hit.<br/><br/> Is the above sentence wrong? Somebody says that you'd better not use the negative phrases two times in one sentence. Is it?<br/></u>