1In our life, we sometimes _______________ what we have for our friends. A. sacrifice B. determine C. apologize D. thank 2. I think it is _______________ to ask someone’s age. A. careless B. impolite C. disrespectful D. useful 3. The average _______________ pays 40 penny a day in water rates. A. housekeeper B. housework C. household D. housemate 4. We are a very ___________ family, so we support each other when facing troubles. A. close- knit B. well- done C. hard – up D. old- aged 5. Which books _______________ to school yesterday ? A. did you take B. Do you take C. have you taken D. you took ( Giải thích dùm mình luôn nha )