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.Let's go.
A.What a pity! B.You konw what I mean. C.I hate to leave. D.But I need the exercise more.
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.
单项选择题 Our family（）not to exchange Christmas gifts this year.
