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.