Which is the correct sentence?

It is time to do ____ homework.

Where's the _____ post office, please?

Choose correct spelling.

What is a noun?

Which one of these sentences is correct:

Choose the correct spelling: He bought the chair at a church _____.

You cannot drive a car ____ you turn eighteen.

Complete the following sentence by choosing the correct spelling of the missing word. Mrs. Baker took her ______________ class on a field trip to the zoo.

There was no taxi available, so we had to come ____ .

The king was attacked by an ______.