中国石油大学 / 中石油
正确率:100%
19. When William hurried home, he found that his mother ____already ____to hospital.
A、has; been sent
B、had; sent
C、has; sent
D、had; been sent
A、has; been sent
B、had; sent
C、has; sent
D、had; been sent
参考答案:
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