Exercises on Grammar
Choose the correct answer :
1 - You ................. eat too much salt.
a) should b) must c) shouldn't d) mustn't
2 - When driving, you ................. always stop at the red light.
a) should b) must c) shouldn't d) mustn't
3 - We ................. to have different bins everywhere for food waste.
a) should b) must c) ought d) mustn't
4 - There‟s a lot of dust on the bookshelf. You ........... clean your room more often.
a) should b) must c) need d) have
5 - We ................. drop any food on the floor in the library.
a) needn‟t b) oughtn‟t c) shouldn't d) mustn't
6 - I think you ........... keep a person still if he or she has broken his or her arm.
a) ought b) must c) „d better d) shall
7 - You ................. talk when the teacher is explaining things to you.
a) should b) must c) oughtn‟t d) mustn't
8 - I ................. breathe here. Please, open the windows.
a) can‟t b) must c) shouldn't d) mustn't
9 - You ................. wash your hands after working in the garden.
a) should b) need c) shouldn't d) mustn't
10 - You ................. eat food after it falls on the floor.
a) should b) must c) shouldn't d) mustn't
11 - It‟s better ................... your keyboard frequently.
a) clean b) cleaning c) to clean d) to cleaning
12 - You ........... drive a car without holding a driving licence. It's against the law.
a) oughtn‟t b) needn‟t c) shouldn't d) mustn't
13 - It‟s ..............to wash your hands very carefully with soap and a lot of water.
a) banned b) desirable c) forbidden d) prohibited
14 - You ...................... clean your table even if it looks clean.
a) are allowed b) must c) need d) should
15 - When you cook frozen food, you ....................... heat it to about 75°C or more.
a) need b) must c) „d like d) ought
16 - We ................. always cook chicken before we eat it.
a) should b) must c) shouldn't d) mustn't
17 - You‟ve an important test at school next week. You should ....... revising now.
a) start b) starting c) started d) to start
18 - You ................ always boil tap water before you drink it.
a) shouldn't b) can't c) mustn't d) should
19 - You ................... eat any food that smells bad.
a) must b) mustn't c) ought to d) oughtn‟t
20 - Rice ................. have water in order to grow.
a) must b) should c) had better d) ought to
21 - If you have touched an infected bird, you .................. wash very well.
a) shouldn't b) must c) can't d) could
22 - Children ................. taught to respect their elders.
a) should be b) had better c) has to be d) must have
23 - A: I‟m putting on weight. B: You ................. go on a diet.
a) ought b) had to c) needed to d) should