You shouldn’t drive        fast.It’s dangerous.

At Sam’s birthday party he had many guests, who were ________friends of his.

.—Jenny, I've finished my summer school classes.—Well, Chinese is _______ difficult to learn, isn't it?—It seemed that _______ at first. But after a while it starts to get easier. I got an A in the exam.

 A terrible accident occurred in that coal mine last year, which left some miners ______disabled. They couldn’t work for the rest of their life. 

Luckily, the driver _____ missed hitting the tree by only several inches.