1.I used to do my homework with my best friend.
2.there are billions of stars in the universe.
3.he is able to work out this math problem.
4.I took photographs of the rising sun yesterday.
5.everyone went to the zoo,as well as our teacher.
6.MJ is famous all over the world.
7.there are many benefits of doing exercises,for example,building up our strength.
8.He loos like very angry today.
9.He was poor in the past.
10.he likes to make a lot of friends.
11.We plan to go to cinema at the weekend .
12.hurry up!or you'll be late!
13.When the clock rang,he got up in a second.
14.thingking of his situation,we desided not to tell him the truth,
15.She cut the cake in half.