I met a good friend of mine while I （ ） on the street.
（A）walks
（B）walk
（C）was walking
（D）am walking
I don't know if Mr. Li （ ） to the party this evening. — I think he will come if he （ ） free.
（A）will come; is
（B）will come; will be
（C）comes; is
（D）comes; will be
If there is any change to the plan, I （ ） you as soon as possible.
（A）told
（B）have told
（C）tell
（D）will tell
