[ Present Perfect ]
Mary has worked as a doctor _____ 12 months.
A. since
B. for

Random Topics:
Grammar - to beConditional Sentences and AdverbsWish SentencesSimple present/ past/ future tenseReflexive pronounsDescribing WordsConditionals and WishesPronounsConjunctions - Conjunctive AdverbsPrepositionOther quiz:
Past Tenses › ViewWhich is a correct example of the past perfect progressive tense?
A. Did she work last night?
B. Was she working last night?
C. Had she been working last night?
D. Will she have been working all last night?
Tag Question › View
Come there early, ____?
A. will you
B. won’t you
C. would you
D. wouldn’t I
Grammar › ViewAli is not feeling well, ——- he is not coming today.
A. so
B. but
C. and
D. or
Modal Verbs › View
She … have medical exams before her application is validated.
A. might
B. must
C. may
