She couldn't leave earlier,because there happened ----a English testA.to be B.to have C.to take D.to hold要理由
问题描述：
She couldn't leave earlier,because there happened ----a English test
A.to be B.to have C.to take D.to hold
要理由
答
选A happen to be 碰巧发生某事 为固定结构，记住即可
答
there happen（s） to be 意为恰巧有
答
选A,there be 结构嘛,happen to 表示偶然,碰巧,本句译为,她不可能离开的更早,因为碰巧有一场英语测试,
答
A happen to be 是恰巧的意思 这句话的意思就是恰巧有一个考试 because后面的主语并不是she,所以B，C，D都不对