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