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№3.

1 there are some

2 there is  an

3 there is a

4 there is a

5 there is some

6 there are some

7 there are some

8 there are some

9 there is some

10 there are some

№4.

1 some, some, an

2 some, a, some

3 some, an

4 some, some, some

3.

1 There are some

2 there is an

3 there is some

4 there is a

5 there is some

6 there are some

7 there is some

8 there are some

9 there is some

10 there are some

4.

a, some,an

2. Some, a, some

3. Some, an

4. Some,some,some