第28题: [单项选择]______ , we'll go out to have a picnic. A. Given good weather B. When the weather is good C. Provide the weather is good D. Unless the weather is good 参考答案:A 答案解析:given+名词是“假定,如果”的意思,或用provided(that)也可以,但选项C用provide不对,B项的when不能引出条件句,所以A正确。