(1)
It's his ruler. (将句子变为复数)
--> Those're their rulers .
(2)
Those are Chinese teachers. (将句子变为单数)
--> That is a Chinese teacher.
(3)
I want a pair of socks.(变同义句)
-- > I want to buy a pair of socks.
(4)
What can I do for you?(变同义句)
--> Can I help you ?
(5)
These tomatoes are tow yuan a kilo.(对画线部分提问)
-- > How much are these tomatoes?