请教一些英语习题并帮忙解答，谢谢！！

Question

—Shall we go for a picnic this Saturday?
__All right._____it rains.
A.If B.When C.Unless D.until

____we deal with our problems, we can easily become unhappy.
A.Unless B.until C.though D.Whether

Mike is good at playing basketball_____Brnce does well in football.
A.when B.until C.since D.while

Answer 1

CAD
1周六去野餐吗？好的，除非下雨。
2.除非处理我们的问题，我们很容易不开心。（unless 用if not替换，含义就清楚了）
3.麦克擅长篮球而布鲁斯足球踢得好。