[ Grammar ]
I called my doctor’s office, but I got the voicemail. They ________ be closed for lunch.
A. must not
B. won’t be able to
C. will be able to
D. must

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Types of Sentence StructureA/AnPassive Voice in Past and Present TenseKinds of NounsModals of ObligationAdverbial Clause, Noun ClausePast Tense vs Future TenseTransition WordsIntermediate PrepositionsUsed to & would & Past SimpleOther quiz:
Grammar › ViewWe __________ each other since our secondary school days and we are still in touch with one another.
A. know
B. have known
C. had known
D. have been knowing
Grammar › View
If David ________ answer my phone this time I ________ call him again.
A. won’t—-don’t
B. doesn’t—-won’t
C. won’t—-doesn’t
D. isn’t—-won’t
Grammar › ViewPast simple and past participle of FLY
A. FLEW / FLOWN
B. FLIED / FLIED
C. FLEWED / FLOWNED
D. FLI / FLUN
Grammar › View
Kim did not practice hard enough ________ she failed her piano exam
A. so
B. still
C. but