一、
1. A
2. C
3. D
4. D
5. B
6. A
7. D
8. B
9. B
10.C

二、
1. is
2. Are  aren't
3. is
4. Is   is
5. is
6. Are  aren't
7. is
8. Are
9. are
10.are

三、
1. is a student
2. Are there any
3. aren't any
4. Yes, there is.
5. There was

四、
1. is —— are
2. are —— is
3. have —— are
4. are —— is
5. is —— isn't

五、
1. There is a clock on the wall.
2. There are two pencils and an eraser in the pencil case.
3. There once were many trees in the garden.
4. There was a school here two years ago.
5. Are there any books in the schoolbag?

一、
1. A
2. C
3. D
4. D
5. B
6. A
7. D
8. B
9. B
10.C

二、
1. is
2. Are  aren't
3. is
4. Is   is
5. is
6. Are  aren't
7. is
8. Are
9. are
10.are

三、
1. is a student
2. Are there any
3. aren't any
4. Yes, there is.
5. There was

四、
1. is —— are
2. are —— is
3. have —— are
4. are —— is
5. is —— isn't

五、
1. There is a clock on the wall.
2. There are two pencils and an eraser in the pencil case.
3. There once were many trees in the garden.
4. There was a school here two years ago.
5. Are there any books in the schoolbag?