We usually visit the library _ Mondays.

• in

• on

• at

• when

Are you _ a train?

• in

• on

• of

• at

Get _ the car quickly, we don't have much time.

• in

• at

• on

• of

The restaurant is usually very busy _ the morning, it serves breakfast for the employees.

• in

• on

• at

• when

will you be free _ 7 p.m tonight?

• at

• in

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• for

Eugene's birthday is _ June.

• in

• on

• for

• at

I have known their family _ 12 years.

• since

• for

• at

• in

They have been married _ 2000.

• since

• for

• in

• on

The engine _ the car still works well despite being old.

• off

• of

• in

• or

You cannot enter the building _ a permission card.

• with

• without

• for

• and