[ Modals ]
. The new software __________ installed last week. It is running perfectly now.
A. Would be
B. Might
C. Could been
D. Should be
E. Must have been

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Modals VerbsContrastive ConjunctionsPreposition & GerundContinuous and Perfect TensesSo Such Enough TooSimple Present vs Present ProgresiveHabitual and Continuous TensesModals and Comparative SuperlativeConditionals 1,2,3Countable QuantifiersOther quiz:
Tenses › ViewListen! Mrs. Jones (play) the piano.
A. has
B. has been playing
C. will play
D. is playing
Grammar › View
You mustn’t use a correction pen ________ errors in this assignment.
A. to prevent
B. to cover
C. to correct
D. to reduce