12. My aunt has worked in clinic ____1949.
A: after
B: since
C: before
D: till
A: after
B: since
C: before
D: till
举一反三
- My aunt has lived in Australia ___1980. A: for B: since
- I'msorryyou'vebeenwaitingsolong,butit'llbesometime______Briangetsback. A: before B: since C: till D: after
- He has worked very hard ______ he entered the factory. A: when B: till C: while D: since
- My uncle Ratchit preceded my father in the family business.Preceded means that Uncle Ratchit A: worked before my father. B: worked after my father. C: worked at the same time as my father. D: stole from my father.
- Miss Gao has been a teacher _________ 1990. A: before B: after C: since D: in