鲤鱼中品质最好的是（）。
A、江鲤鱼
B、黄河鲤鱼
C、塘鲤鱼
D、河鲤鱼
参考答案：B
— Hello, Sandy. This is Jack. What are you doing?
— I'm watching a match. It started at 7 p.m. and _____ on for another half an hour. [ ]
A. has been
B. was
C. had been
D. will be
()是人体必需的微量元素之一，是构成甲状腺素的重要成分。
A．铁
B．钙
C．碘
D．钠
