Don't drink coffee before going to bed, _______ it will keep you up all night!
A. or B. and C. since D. for
Don't drink coffee before going to bed, _______ it will keep you up all night!
A. or B. and C. since D. for
A
考查句子之间连词的使用。根据前后句子之间的逻辑关系，此处只有or“否则”合乎语境。