having done 表示在主句谓语动词之前已经发生的动作。
“照料母亲两年”这一动作发生在“需要休假”之前,因此选A
eg having finished her homework, she went to sleep. 写完作业之后,她睡觉去了。
having done 表示在主句谓语动词之前已经发生的动作。
“照料母亲两年”这一动作发生在“需要休假”之前,因此选A
eg having finished her homework, she went to sleep. 写完作业之后,她睡觉去了。