Dogs are kept to ______ the houses from thieves at night.

What do you think of the furniture on exhibition? — Well, great! But I don’t think much of _____ you bought. [ ]

My sister doesn’t like rice _____ dumplings, _____ she likes beef _____ tomato noodles.

．You’d better get the problem solved as soon as possible ______ it becomes out of control

The situation wasn’t very good, but I ________ many worse situations