[ Modal Verbs ]
They ___ be lost. They’ve been driving around for hours.
A. can
B. must
C. may
D. might

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Will & Be going toIf Conditional Zero and OneIf/Unless - Conditional type 1Present ContinousSubject/Verb Agreement with Collective NounsPronouns ( Interrogative )Past Tense vs Present Perfect TenseComparatives or SuperlativesHow much or How many?Passive Modals in Different TensesOther quiz:
Modals › ViewDon’t ride so fast, you ____ have an accident.
A. could
B. should
C. must
Grammar › View
Huang Chen and Ern Bei ______ to play computer games.
A. likes
B. like
Vocabulary › Viewthe ability to be maintained at a certain rate or level
A. energy conservation
B. human impact
C. renewable resources
D. sustainability
E. availability
Modal Verbs › View
Perhaps the teacher is in the staff room. The teacher __________________ be in the staff room.
A. Must
B. Might
C. Can’t
D. Has to
