[ 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:
Tenses › ViewLondon was sleeping.
A. simple past
B. past continuous
C. past perfect
Grammar › View
They agreed _____ for a bike ride on Monday, but I didn’t because I had an English class then.
A. go
B. going
C. to go
D. to going
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
