A research shows that raising a pet can ______ people ______ when they are down.

(单选题)—I want to make a kite to fly.—______ You can easily buy one (单选题)—How do you react ______ your father’s suggestion?—I reacted (单选题)______ it is to sit down and have a good chat with your clos (单选题)My mother complained that my old books were ______ too much (单选题)It seems there are ______ people out of work. Something must (单选题)Don’t speak unless you completely ______ what others say. (单选题)Don’t mention that at the beginning of the story, or it may (单选题)If we sit in ______ front of the bus, we’ll have ______ bett (单选题)______ the heavy rain and flooding, lots of people have been (单选题)As a new graduate, he doesn’t know ______ it takes to start