I shall be back __________ a week.
With
Within
By
Over
He sat _________ a big stone.
At
In
On
None of these
I am always at home __________ a Sunday morning.
My house is _________ the river.
Along
Towards
He is __________ to London.
Of
Off
Up to
I am confident __________ his success.
To
From
I congratulate __________ her success in the examination.
Upon
The viiage is 50 miles __________ from the city.
We set off________ 7o' clock _________ the morning ________ April 5th.
At, in, on
In, at, On
By, in, on
I ordered __________ a vegetarian lunch.
of
at
from
No preposition needed.