The Expression of Obligation

The example of expressing obligation is...

• They have to wear uniform at school

• You should wear uniform at school

• You aren't allowed to wear uniform at school

• We must not wear uniform at school

"He must study hard for the next test."

The sentence shows the expression of...

• instruction

• suggestion

• ability

• obligation

It is Monday. The students are having flag ceremony. Every student ..... wear uniform. They are standing in the yard.

• can

• must

• may

• should

"Do you know that you ..... stop when the traffic lights are red?"

The best answer to complete the sentence is...

• ought to

• have to

• must

• should

These are the examples of expressing obligation, except...

• You shouldn't do that

• Really, must give up drinking coffee milk

• We have to sleep before 10 p.m

• She must wash her hands before eating

Which of the following sentence is the expression of obligation?

• Please, be on time!

• No parking here!

• Why don't she wear raincoat?

• He has to wake up earlier every morning

"This class is very dirty. We... clean it before the teacher comes." The best answer to complete the sentence is...

• should

• must

• must not

• should not

"The test is five minutes left. We... finish it soon." The best answer to complete the sentence is...

• shouldn't

• should

• have to

• musn't

"She must help her mother" is the example of.... expression.

• prohibition

• suggestion

• opinion

• obligation

"The students must obey the rules at school" is the expression of...

• suggestion

• obligation

• prohibition

• attention