Choose the correct answer. Do we use prepositions before times, places, or both? times / places / both

Which is correct? We'll go on foot./ We'll go by foot. /both 1 Which is correct? I'm at home. /I'm at the home, /both

4 Do we use for with the present perfect simple to show when a situation - which is still continuing - started?

yes / no 5 Do we use since with the present perfect simple to show how long a situation has continued? yes / no

6 Which is correct? I've been here since 5pm./ I've been here since two hours./ both​
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