Question 1

You …………….. eat too much salt.

Accepted Answer

shouldn't

Answer

must

Answer

should

Answer

mustn't

Question 2

When driving, you …………….. always stop at the red light.

Accepted Answer

must

Answer

should

Answer

shouldn't

Answer

mustn't

Question 3

We …………….. to have different bins everywhere for food waste.

Accepted Answer

ought

Answer

mustn't

Answer

should

Answer

must

Question 4

There's a lot of dust on the bookshelf. You ……….. clean your room more often.

Accepted Answer

should

Answer

must

Answer

have

Answer

need

Question 5

We ………….…. drop any food on the floor in the library.

Accepted Answer

mustn't

Answer

needn‟t

Answer

shouldn't

Answer

oughtn‟t

Question 6

I think you ……….. keep a person still if he or she has broken his or her arm.

Accepted Answer

must

Answer

ought

Answer

'd better

Answer

shall

Question 7

You …………….. talk when the teacher is explaining things to you.

Accepted Answer

mustn't

Answer

oughtn't

Answer

must

Answer

should

Question 8

I …………….. breathe here. Please, open the windows.

Accepted Answer

can't

Answer

must

Answer

shouldn't

Answer

mustn't

Question 9

You …………….. wash your hands after working in the garden.

Accepted Answer

should

Answer

mustn't

Answer

shouldn't

Answer

need

Question 10

You …………….. eat food after it falls on the floor.

Accepted Answer

mustn't

Answer

should

Answer

must

Answer

shouldn't

Question 11

It‟s better ………………. your keyboard frequently.

Accepted Answer

to clean

Answer

to cleaning

Answer

cleaning

Answer

clean

Question 12

You ...…….. drive a car without holding a driving licence. It's against the law.

Accepted Answer

mustn't

Answer

shouldn't

Answer

needn't

Answer

oughtn't

Question 13

It’s ………….. to wash your hands very carefully with soap and a lot of water.

Accepted Answer

desirable

Answer

prohibited

Answer

banned

Answer

forbidden

Question 14

You ...................... clean your table even if it looks clean.

Accepted Answer

should

Answer

need

Answer

must

Answer

are allowed

Question 15

When you cook frozen food, you  ....................... heat it to about 75°C or more.

Accepted Answer

must

Answer

need

Answer

may

Answer

ought

Question 16

We …………….. always cook chicken before we eat it.

Accepted Answer

must

Answer

should

Answer

mustn't

Answer

shouldn't

Question 17

You…..finish that report tonight if you're too tired. Midday tomorrow is the deadline.

Accepted Answer

needn't

Answer

shouldn't

Answer

must

Answer

need to

Question 18

You ……………. always boil tap water before you drink it.

Accepted Answer

should

Answer

shouldn't

Answer

can't

Answer

mustn't

Question 19

You ………………. eat any food that smells bad.

Accepted Answer

mustn't

Answer

must

Answer

ought to

Answer

oughtn't

Question 20

Rice …………….. have water in order to grow.

Accepted Answer

must

Answer

ought to

Answer

should

Answer

had better

Question 21

If you have touched an infected bird, you ……………… wash very well.

Accepted Answer

must

Answer

shouldn't

Answer

ought to

Answer

can't

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