chip in=contribute money捐献
12.He usually buys his clothes off the peg.It's cheaper than going to a dressmaker.
Off the peg clothes =成衣
13.Now stop beating about the bush and tell me what happened!
beat about the bush=avoid saying directly what you mean
14.I really must go and lie down for a while ;I've got a splitting headache.
Splitting headache=painful headache
