作业帮英语语法选择题（请说明原因）It is now clear that no such creatures as vampires have seen and none _____in the world.A.was found B.are found C.have been found D.have been found out改正：题目少了一个been,应该是It is now clear
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英语语法选择题（请说明原因）It is now clear that no such creatures as vampires have seen and none _____in the world.A.was found B.are found C.have been found D.have been found out改正：题目少了一个been,应该是It is now clear
英语语法选择题（请说明原因）
It is now clear that no such creatures as vampires have seen and none _____in the world.
A.was found B.are found C.have been found D.have been found out
改正：题目少了一个been,应该是It is now clear that no such creatures as vampires have been seen and none _____in the world.
英语语法选择题（请说明原因）It is now clear that no such creatures as vampires have seen and none _____in the world.A.was found B.are found C.have been found D.have been found out改正：题目少了一个been,应该是It is now clear
选A,很明显find的形式由其主语none决定,用第三人称单数.若用现在完成时需把have改为has.
一楼正解；D的意思不对，参见二楼
C 现在完成时，have been found 表至今为止还没被找到。也和前面的have been seen 对应。
现在我们清楚了，在这世上没看见过也没找到过像吸血鬼这种生物。
同意一楼的观点，选C,应该是现在完成时的被动语态，，意为没有被发现
C. have been found
应该是接前面，用完成时。
find out
1. 找出；发现；查明(真相等)：
I'll find out her secret.
我要弄清她的秘密。
2. 查出…的罪行；揭发出；使受惩罚(或报应)：
“Be sure your sin will find you out.”
“你要相信你的罪行...
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C. have been found
应该是接前面，用完成时。
find out
1. 找出；发现；查明(真相等)：
I'll find out her secret.
我要弄清她的秘密。
2. 查出…的罪行；揭发出；使受惩罚(或报应)：
“Be sure your sin will find you out.”
“你要相信你的罪行总要败露的。”
3. 对(某弱处)起作用：
This cold weather finds out my old wound.
这个寒冷的天气使我的老伤发作了。
4. 计算出
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