[ Modals ]
The line is busy; somebody _____ on the telephone now.
A. should be speaking
B. should have been speaking
C. must be speaking
D. can’t be speaking

Random Topics:
Simple Present vs Present ProgresiveDefinite vs Zero Article Abstract NounsVerbal and Appositive PhrasesWho vs WhomModals for Advice, Obligation/Prohibition, Necessity and Lack of NecessitySuch...that, so ......thatFrequencyPerfect and Past TensesContrastive ConjunctionAdjective OrderOther quiz:
Reported Speech and Tenses › ViewTransform ‘sad’ into an adverb:
A. sadly
B. sadley
C. sader
Modal Verbs › View
We ___ go hiking this weekend.
A. could
B. would
C. Should
Embedded Questions › ViewCan you explain why ____ so expensive?
A. Is it
B. It’s
Grammar › View
That restaurant _________ restaurant in our town.
A. is the worst
B. is bad
C. worst
