Question

老师，我这3几道题不懂，能帮我详细讲一下么？谢谢！

Tom drank up whole bottle of milk , ___evena drop to his little brother
A. not leave B. leaving
C. not leaving D. not to leave
A person ____a foreign language most beable to use the language ____all his own.
A. learning ; forgetting B. to learn ; to forget
C. using ; but D. who learns; to forget
____from the moon ,our earth , with water___seventy percent of its surface ,
appear as a “blue ball”.
A. see ; covered B. seeing ; covering
C. seen ; covering D. to see ; to covered

Answer 1

看了你的题目，我感觉是doing 和to do，这两种形式用法你不了解的原因。doing一般表示做过或正在做的事情，而to do是没有做过或者打算去做的事情。第一题中的句子是TOM喝光了整瓶牛奶，甚至一滴也没给他弟弟留下。他已经做了“喝光牛奶”这件事情，所以“没留下”一滴要选C。
第二题的句意是：一个(正在)学习外语的人必须在学会使用这门外语的同时忘掉自己的母语.forgetting是现在分词做伴随状语，与 be able to use the···这两个动作同时发生。而to do没有这个功能。
第三题：句子主语是our earth，是see的宾语，所以用seen（过去分词表示被动、完成）。因为water是主动cover的，或者说cover这个及物动词已经有了宾语（也就是seventy percent of its surface），所以covering（表示主动）
从月球上(被）看，我们的被水覆盖70%表面的地球，看上去是一个蓝色的球体

Answer 2

Tom drank up whole bottle of milk , _C__even a drop to his little brother
A. not leave B. leaving
C. not leaving D. not to leave
A person _A___a foreign language must be able to use the language ____all his own.
A. learning ; forgetting B. to learn ; to forget
C. using ; but D. who learns; to forget
__c__from the moon ,our earth , with water___seventy percent of its surface ,
appear as a “blue ball”.
A. see ; covered B. seeing ; covering
C. seen ; covering D. to see ; to covered

Answer 3

1.c,现在分词表示伴随，喝掉全部和不留一滴是同时的事
2.a ,同上
3.c,地球是被看到，第一个要用被动，第二个水的覆盖是主动，所以用现在分词