1.turn to 向(某人)求助；求助于
There was no one to turn to, no one to tell.
2.weigh in （使）称重量;参加，介入;发表见解
The President's political advisers also weighed in on the plan...
3.call in sick 打电话请假；请病假吧；以生病为缘由请假
Many employees are used to being able to "call in sick" and have someone else cover their job, for instance.
4.in the dark 无知，不知
I'm as much in the dark as you.