If anyone happens to drop in while I am out...
问题描述：
If anyone happens to drop in while I am out...
If anyone happens to drop in while I am out,( )him or her leave a message.
A ,have
B ,get
C ,ask
D ,tell
请问选什么?原因是什么?
答
选A have
只有have是have sb do sth ,
其余的都是to do sth
him or her leave a message是sb.do sth.