Obligation

I don't have to wear my uniform today.

The statement means....

• It is necessary for me to wear my uniform

• I must not wear my uniform today

• I have to wear my uniform today

• I don't have any obligation to wear my uniform today

The following statement is not rule for camping....

• You must not make graffiti

• You have to keep your environment clean

• You must put on your helmet

• It is important for you to buil a tent on the flat surface

Remember, you’re in a library, you .... speak loudly.

• must not

• must not be

• don't have to

• don't have to be

You .... come within guest hour if you want to see your friend in a hospital.

• must not

• Have to

• Must

• don't have to

The sign means....

• You have to operate a forklift in this area

• becareful to the forklifts

• forklifts must enter the area

• Forklifts are not allowed to enter the area

The picture tells us that....

• It is forbidden to eat in the class

• You may come late to come to the class

• Students don't have to talk in the class

• Students must be in time

Here is one of the rules in a safari....

• You must choose inexperience safari operators

• You are not to get out off from the vehicle

• You don't have to wear natural color

• You have to stop to take picture

The sign means....

• You have to operate a forklift in this area

• becareful to the forklifts

• forklifts must enter the area

• Forklifts are not allowed to enter the area

A: I need dictionary, but it's too expensive.

B:-----

What is the best respond for that dialog?

• you should thief at any bookstore

• you should force your parents to buy it

• you should prepare it before

• you should have saved some money to buy it.

A:Why are you here? you ... your classroom.It is your turn.

B:Oh,no.I forgot.Okay,I will go there.

What suitable expression to complete the sentence?

• should clean

• should be cleanning

• should have cleanned

• had better clean