There are 55 students in Class 5, _______ failed in the test.
______ I can know, there is no better way to keep away from the danger.
He said he would work it out himself, ________ ask nobody for help.
They were swimming in the river ______ suddenly the storm started.
________ a difficult situation, so you should send a message to him and give some advice to him .
It was dark______ we arrived at the little town .