B

A∈{11; 12; 13;...; 14; 15}.

B∈ {10; 11; 12; 13; 14; 15;... 19; 20}.

D∈ {-4; -3; -2; -1; 0; 1;2; 3}.

F∈ {1;2;3;4;5;6;7;8;9}

A

1. My mother sometimes helps me with my homework.

2.When is there a festival in your city?

3. How many students are there in Lan's school?

4. My father is watching television in the bedroom.

5. He is tall and has brown hair.

A. are

A

Alice has sunburn because she was outside all day yesterday.

A. Join