The task is very difficult. I wonder whether we will be able to finish it in the ________ of any other helpers.

殷墟郭家庄发掘的160号商代墓，出土青铜礼器40件，方形器数量较多，器表均有精美的纹饰和族徽文字，还有28件青铜乐器和生产工具，220件青铜兵器和900多枚铜镞。这段材料主要反映了商代(  )

    When you stay away form your home for a long time, you start to miss your good bed, your good parents. Believe it or not, you're feeling homesick. You can help yourself to feel less homesick. Here's how:

      ⑴   .If you're going away from home, bring your favourite clothes, you can also bring some pictures of the people who you may miss. You can look at them any time you want.

       ⑵   .The busier you are, the less time you'll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities whenever you are.

       ⑶   .You can make a plan for when you'll call your mom or dad. You can also keep in touch with family and friends by email or text messages.

       ⑷   .Sometimes, telling someone that you're feeling a little homesick will help you feel better. Maybe you can tell a friend that you feel homesick and the two of you can do something fun.