闭路循环氯水直接冷却流程因具有冷却和洗涤作用，目前仍被广泛被采用。
参考答案：错
— I've been told that John _____ from his journey to India. What about visiting him tonight?
— Great. I will call for you at 6:30 pm. [ ]
A. had come back
B. is back
C. came back
D. coming back
—How was _______ dinner at Mike’s house?
—It was great. Mike’s mum is _______ wonderful cook.
A．a, the
B．the, a
C．the, the
D．a, an
