单项选择题
No ready technical data available,we managed to（）them.
A.go without B.go off C.go up D.go down
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.
单项选择题 （）may seem helpful behavior to you can be understood as interference by others.
