Quick check 2 Choose the correct answer. I Do we use prepositions before times, places, or both? times I pl Which is correct? We'll go on foot. / We'll go by foot. I both Which is correct? I'm at home. / I'm at the home. I both Do we use for with the present perfect simple to show when 6 Which is correct? I've been here since 5pm. / I've been 5 Do we use since with the present perfect simple to show he 3 yes/no