1.Let us know the answers,will you?
2.Let's not watching TV.
3.Africa elephants come from the South Africa.
4.First,we sang a song when the class began.
5.It's the very first time for me to eat a hamburger.
6.I was late for class because I got up late.
7.I don't like Tim,for he is a little lazy.
8.There are all kinds of animals in the zoo.
9.Our parents are very kind to us.
10.Can he speak any other languages?
11.He got two watches.One was new,the other one was old.
12.Children like to play with snow in winter.
13.Be quite.The baby is sleeping.