英语根据词的类型填空 麻烦各位英语爱后者帮忙解决一下下面的几道题 解释一下为什么这么填 谢谢了！

Question

1.The medical team_____(comprise) five doctors and two nurses.
2.Glaciers(冰川）are a possible source of fresh water that _____(overlook)for years.
3.I am _____(please) surprised that there is so much information available.
4.We knew from the news report that it _____(snow) in the north since the day before yesterday.

Answer 1

1 、因为主语是单数，根据主谓一致的原则，谓语用第三人称单数形式，答案为： comprises
2 、that从句中有for years，故用现在完成时，答案为： has overlooded
3 、我觉得括号后少了个and，如有and，根据主系表结构，后需表语，答案为：pleased
4 、根据since the day before yesterday及knew，确定用过去完成时，答案为：had snowed

Answer 2

1.is comprised of
2.has been overlooked
3.pleasedly
4.has snowed

Answer 3

1 .is comprised of
2. has been overlooked
3 .pleasedly
4. had snowed

Answer 4

1 is comprised of
2 has been overlooked
3 pleasedly
4 had been snowing