1. A ( to be đứng trước often,usually, never...)

2. B ( điều kiện loại 2 )

3. C ( điều kiện loại 2 )

4. C ( điều kiện loại 1 )

1. He ...... very busy at the present. He .... free time to go out.
A. Is often/ rarely has           B. Often was/ had rarely
C. Has often been/ has rarely      D. Often is/ rarely has
2. ................ if a war happened?
A. What yiu would do         B. What would you do
C. What will you do             D. What will do you
3. ................ , we would go to the sea
A. Was the weather nice today
B. The weather were nice today
C. If the weather were nice today
D. The weather is nice today
4.  ................. to the dentist if she has a bad toothche
A. She could go                  B. She would go
C. She should go                D. She shouldn't go

#NOCOPY