seem用法， 冲突啊!( 争取解决这个历史遗留问题)

下面两个题目都是大全题目. 补充37题说

seem to be中的to be不能省略,

但是前面一个题目明显没有to be, 也是正确的。

搜索了很长时间,没有结果.这次大家努力一下,把问题解决了吧

21.   The filibuster, a parliamentary device that slows the snail’s pace that prevails even in the best of times in congressional sessions and tests the endurance of everyone associated with it, seems more and more an anachronism in the age of telecommunications.

(A) sessions and tests the endurance of everyone associated with it, seems

(B) sessions and tests the endurance of everyone who is associated with it, seeming to be

(C) sessions, tests the endurance of everyone associated with it, seems

(D) sessions, that tests the endurance of everyone associated with it and seems（A）

(E) sessions, testing the endurance of everyone associated with it and seeming

37.   Seeming to be the only organization fighting for the rights of poor people in the South, Hosea Hudson, a laborer in Alabama, joined the Communist party in 1931.

(A) Seeming to be

(B) As

(C) In that they seemed

(D) Since it seemed（E）

(E) Because it seemed to be

both are acceptable. The following is quoted from Longman.

seem S1 W1 [linking verb, not in progressive]

1 to appear to exist or be true, or to have a particular quality:

Ann didn't seem very sure.

It seems a foolish decision now.

seem to do something

The rainbow seemed to end on the hillside.

seem important/right/strange etc to somebody

Doesn't that seem weird to you?

it seems to somebody (that)

It seems to me you don't have much choice.

it seems (that)

It seemed that Freeman had killed the man, and dumped the body in the lake.

it seems likely/unlikely/reasonable/clear (that)

It seems likely that he will miss Ireland's next match.

seem like

Teri seemed like a nice girl.

Well, it seemed like a good idea at the time.

We waited for what seemed like hours.

seem as if/as though/like

It seemed as if the end of the world had come.

It seems like you're catching a cold, Taylor.

'So Bill's leaving her?' ' So it seems (=it appears to be true).'

2 can't/couldn't seem to do something used to say that you have tried to do something but cannot do it:

I just can't seem to relax.

3 used to make what you are saying less strong or certain, and more polite

seem to do something

I seem to have lost my car keys.

it seems (that)/it would seem (that)

It would seem that someone left the building unlocked.

谢谢joe11

但是og 的解释中有这么一句话

to be is needed to complete the predicate begun by seemed

如何理解呢?

NN?