1.      So is there life on Mars?

2.      Mercury is one planet in the Solar System.

3.      There is no moon tonight.

4.      Have you met Lam, my next-door neighbor?

5.      She was brought up in an orphanage.

6.      Tom is very shy but his sister is outgoing.

7.      She is always good at keeping peace within the family. 

8.      My parents took a lot of photographs of us when we were small.

9.      It gives me great pleasure to introduce our guest speaker.

10.  Mr. Hung is the principal of Thang Long primary school.

11.  Peter is not communicative. He's rather reserved in public.

12.  The Sun rises in the East. 

13.  He is 16, but he seems younger.

14.  It was silly of you to go out in the sun without a hat.

15.  How do you keep so slim?

16.  Lan is very sociable, and she has a lot of friends.

17.  She has long straight hair.

18.  Schools need volunteers to help children to read.

19.  I volunteered for service in the Air Force.

20.  The sun sets in the west.