zhang dong went to a park on foot(对划线部分提问)（提问on foot） I saw monkeys in the zoo (提问in
(提问 in the zoo）
I took some pictures on my holiday.（提问took some pictures）
I went swimming last weekend （提问went swimming）
I watched TV last Saturday （改为一般疑问句）
Sarah read a storybook yesterday （改为否定句）
this is a box and that is a knife（改为复数句）