This quiz focuses on the use of IN, AT, ON, BY, ETC.  The sentences are random -- there is no central theme or topic -- but use everyday English. If you think that there is more than one possible answer (rare), choose the one most commonly used.

Use the timer if you want more of a challenge. However, you only see your mistakes and the correct answers at the end.

Without the timer, you see your mistakes immediately, and also at the end.

• If you click on Without Timer: Easy, the quiz gets easier as you proceed.
• If you click on Without Timer: Hard, the quiz gets harder as you proceed.