Foundation
English
Verb
Tenses
Question
Fill in the blank with the most appropriate option:
Guests of the hotel _____ warn the clerk in advance when they leave.
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Solution
The correct answer is Option B.
MUST expresses COMPULSION.
In the given sentence it is compulsory for the guests to warn the clerk.
Thus MUST is the correct answer.
The remaining options are incorrect because:
CAN means ability.
MAY means possibility.
IS TO and HAD TO are grammatically incorrect.