1 It's spring now.The students _____trees these weeks.
A plant B are planting C will plant D planted
2 Jim asked Lin Feng ____forget to change water.
A to not B don't C not D not to
3 At last it made them ____.
A happily B quickly C friendly D slowly
4 I like exciting trips ,I'd love to trek ____the Amazon jungle next summer,because it's a good place to explore.
A across B throuth C crossing D cross


1. B 根据spring now, these weeks可以判断是正在植树，此处可不是现在进行时表示将来呀，呵呵
2. D 肯定：ask sb. to do sth.
     否定：ask sb. not to do sth.   注意：可不是don't呀，如果是ask sb. don't to do sth. 那么助动词do后面的动词原形在哪里？呵呵，所以不能用don't
3. C make的用法：make sb. do sth.
                 make sb.+adj:表示一种状态。这里面只有C是形容词。
4. B along: 沿着 across:表面横穿 through:立体面穿过
       亚马逊丛林肯定是立体的，所以选择B
      另外：cross为动词，=walk/run/drive across