1.What are on show in the museum?

1.What are on show in the museum?
Some photos——by the children of Yushu,Qinghai.
A.have been taken B.were taken C.are taken D.taken
快中考了 这些基础题多做不来 我烦死了 救救我吧
就是这类题目搞不懂,什么形式怎么用啊
还有“死”的用法,“成功”的用法.
______you are,_______mistakes you'll make.
A.the more carefully,the fewer
B.the more careful,the less
C.the more carefully,the less
D.the more careful,the fewer
Hong Kong——to be a good place for eating today
A.konws B.knew C.is known D.was known
Last month a new law_in China to stop people from smoking in public places
A.is passed B.passes C.had passed D.was passed
Can you sing this English song?
Of course,I can.It——many times on the radio
A,taught B,has taught C,is taught D,has been taught