She _______ have been tired after working all day.
A. must
B. must have
C. can
D. should

Random Topics:
Modal VerbRelative Clauses and UsageDeterminers & QuantifiersCoordinating & Subordinating ConjunctionsAuxiliaries VerbQuestion tag and + - AgreementPast Continuous Tense & Past ModalsComparative and SuperlativesVerb-ing or to VerbFor vs SinceOther quiz:
Grammar › Viewwhich type of sentence is the following: I saw Daniel, and I talk to him.
A. compound sentence
B. simple sentence
C. compound complex
Sentence Completion › View
With his ______ eye for detail, the appraiser was easily able to spot that the piece was a fraud and not a real Picasso.
A. inattentive
B. discerning
C. superficial
D. neglectful
Grammar › ViewWhat is the purpose of using specific time markers in the simple past tense?
A. To convey the frequency of actions
B. To describe completed actions
C. To express general truths
D. To indicate the time of an action
Grammar › View
I ______ (be) a teacher _____ 30 years.
A. I have been a teacher for 30 years.
B. I have been a teacher since 30 years.
C. I has been a teacher for 30 years.
D. I has be a teacher since 30 years.
