21.      You’ve put on weight. You __________ get more exercise.
A      can B      could C      should D      would

22.   Passengers ______________ smoke in the no-smoking area.
A      could not B      must not C      have to D      can

23.   If you’re going to the supermarket you _______________ get me some groceries.
A      could B      have to C      will D      should

24.   Unless you give that plant some water it _____________ die.
A      would B      will C      can D      must

25.   When you reach the top of the hill you __________ see for miles and miles.
A      should B      must C      would D      can