1. I ——————— at a bank.

A. work

B. works

C. working

2. She ——————– with her parents.

A. live

B. lives

C. living

3. Cows ———————– on grass.

A. feed

B. feeds

C. feeding

4. He ———————- a handsome salary.

A. earn

B. earns

C. earning

5. Janet ———————- to be a singer.

A. want

B. wants

C. wanting

6. Emily ———————– delicious cookies.

A. make

B. makes

C. making

7. Arti and her husband ——————- in Singapore.

A. live

B. lives

C. living

8. Rohan and Sania ———————- to play card games.

A. like

B. likes

C. liking

9. Sophia ————————– English very well.

A. speak

B. speaks

C. speaking

10. Martin ———————– for a walk in the morning.

A. go

B. goes

C. going

11. My grandfather ——————– his pet dog.

A. adore

B. adores

C. adoring

12. Plants ———————– water and sunlight for making their food.

A. need

B. needs

C. needing

Tìm ước chung của:

a) 36 và 45;

b) 18, 36 và 45.

Hãy tìm các tập hợp sau:

a) B(4);            b) B(7).