改错，大神们帮帮忙

1. What's the matter?

2. He is an office assistant.

3. I'm a keyboard operator.

4. Our names are Tom and Hans.

5. They're policemen.

6. Is your mother tired?

7. These children are tired and thirsty.

8. They are old.

9. These Ice-creams are nice(作为可数名词)

what's the matter?
he is an office assistant.
I'm a keyboard operator .
Our names are
They are policemen'
Is your mother tired?
There children are tired and thirsty.
They are old.
These ice-creams are nice.

1.What's the matter? 2.a改成an 3.operater改成operator 4.name加复数s 5.policeman改成policemen 6.Are改成Does 7.child改成children 8.去掉an 9.ice-cream加复数s

1. 中间加the

what's the matter
he is an

names
policemen

children