Answer Key
Pre-test
You have already passed this section on 2015-02-19 at 7:56 scoring 90%.
Choose the correct expression.
- Let's sit [in] the sun.
 - Tom will come back [in] a moment.
 - She stopped [at] the traffic lights.
 - [As] you know, the meeting is very important.
 - Can you see the bird [in] the sky?
 - How many people were [at] the party?
 - Finish the report [by] Friday.
 - I know he did it [on] purpose.
 - It happened [by] accident.
 - [At] the end of the concert, there was no applause.