皮皮学，免费搜题
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【单选题】
城市轨道交通中ISCS指的是（ ）A.
乘客信息系统
B.
自动售检票系统
C.
环境控制系统
D.
监控系统
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】What do you think should _____ the shopping list?
A.
add to
B.
be added to
C.
be adding to
D.
have added to
【单选题】Since the world heritage list was first created in 1972, many more sites _____ it. [ ]
A.
have added up to
B.
are added to
C.
have been added up to
D.
will be added up to
【单选题】If you have figured out something, have you (a) added numbers together, or (b) understood it?
A.
(a) added numbers together
B.
(b) understood it?
【单选题】听力原文： Do you know what Prince Charles, Seve Ballesteros and Elizabeth Taylor have in common? They all suffer from chronic back pain. In fact, bad back is one of the most common health problems today, ...
A.
Celebrity life.
B.
Chronic back pain.
C.
Healthcare for people in all walks of life.
D.
Diet and pain.
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