[ Adverb of Frequency ]
You………………. the front door when you leave.
A. must lock always
B. always must lock
C. must always lock

Random Topics:
Prepositions and TensesVerbs and TensesSimple and Past TensesClause Markers TOEFL GrammarHave vs. HasConditionalsModals and ConditionalsPrepositions and ArticlesPast Simple - Present PerfectClauses and ConjunctionOther quiz:
Modal Verbs › ViewYou ___ study hard if you want to pass the exam.
A. can
B. must
C. might
D. could
Vocabulary › View
The outbreak of COVID-19 in the United State is spreading rampantly.
A. out of control
B. out of resource
C. under surveillance
D. under observation period
She ______ a cake for the party.
A. will bake
B. bakes
C. baked
D. baking
Future Forms › View
These boxes are so heavy. ________ you carry them for me, please?
A. Do
B. Did
C. Will
D. Are
