单项选择题
A:Here's a gift for you,I bought it in India.B:（）.
A.Wow,it is great!Thank you. B.You shouldn't have bought it. C.It must be very expensive. D.That's good.How much is it?
单项选择题 A:Would you father watch TV or go for a walk? B:The TV program is good today.（）. A:Cool.Lets go.
单项选择题 The basic causes are unknown though certain conditions that may lead to cancer have been（）.
单项选择题 If I had not been enjoying the work,I（）so much of it.
