Srianti: The security found the dictionary in room 309. ...

★ Modals Auxiliary

Srianti: The security found the dictionary in room 309.

Sri: It ……….. by one student in that room.

Srianti: I think so.

A. must leave

B. must be leaving

C. must be left

D. must have left

E. must have been left

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Dewi: Many car owners now complain because the fuel price is very high.

Susan: They ……….. public transportation, like bus or train.

A. should have use

B. must have use

C. could have use

D. should use

E. will be used