2, REWRITE
3, The old man isn't strong enough to walk by himself.
4, Don't forget to turn off the light before going out.
5, Alexander Graham Bell was the inventor of the telephone.
6, Peter is not old enough to see the horror film.
7, What an intelligent girl!
8, I am going to come over to pick you up.
9, Mai is younger than Hoa.
10, Hoa's hair is long and black.
11, The theater isn't far Lan's house.
12, Let's go to the movies tonight.
13, I'll give you a call tomorrow evening.
14, This office is not big enough for three people.