－What’s wrong with Tom? He didn’t talk to         all the afternoon.－Oh, he failed in his exam.

The step you have taken is ________ much risk（冒险）.

I would appreciate____ very much if you could change the plan a bit to make it moreworkable.  

My mother insisted that my father should buy a piano for me, and finally he managed to finance   ______.

--- I can’t find my raincoat. I hung it behind the door.--- I saw Peter going away with _____, but I’m not sure whether it’s  yours.