Hurry up! The concert __________ for ten minutes.
A. has begun
B. had begun
C. has been on
D. began
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She has _______ been to Toronto, has she?
A. already
B. never
C. ever
D. still
I________ from him since he left.
A. haven’t heard
B. didn’t receive
C. haven’t got
D. didn’t have
Jim ______already ______in this school for two years.
A. was; studying
B. will; study
C. has; studied
D. are; studying
患者出现哪个系统损害常预示病情危重、预后不良
A. 关节损伤
B. 肺部感染
C. 中枢神经损害
D. 心包炎
E. 急腹症