一位游客坐船从上海出发，沿长江干流到达重庆，沿途看到长江接纳的支流有（    ）

根据上下文理解，选择所给词的适当形式填空。

   Yesterday was Sunday. We had no____ . I wrote a letter to my pen pal and____ lunch for my parents. After lunch I took a ____with Mike through the park behind my house. We saw a little girl____ for something. She lost her keys. “She ____  help,” Mike said. So we helped the girl look for her____ . About ten____  later, Mike found them in the grass. The girl was ____ . We spent much time in looking for the____ keys, but we____  very happy because we did a good deed（做好事）.

下图为某地及附近地区大气水平运动俯视示意图。据此回答下列小题。

影响图中大气运动强弱变化的主要因素是 （　　）

蝗灾是重要的生物灾害之一，它们不仅危害农作物和农田，还对草场造成严重威胁。据此完成：

有关我国蝗灾的叙述，正确的是(   )

①我国历史上造成过重大灾难的害虫首推蝗虫②由于农业现代化的发展，20世纪90年代以来，我国蝗灾已基本消灭③由于蝗虫有远距离迁飞特征，因而不能用飞机来灭蝗

④历史上蝗灾曾经与水灾、旱灾一起并称为三大自然灾害

    If you could give your younger self one piece of advice, what would you say?

要求：（1）作出回答并说出理由；（2）词数不少于60。