[求助]885-补充250-104题

lesterlau

那difficult in和difficulties with在意思上有没有区别呢？

smileday

以下是引用nina23在2003-11-5 22:01:00的发言：
1,there is only one difficulty----homing,so difficulties are wrong.

????
2,form context, the main clause is just a conclusion of the (since pigeons with surgically removed olfactory nerves were found to have increased difficulties in homing.)
namely,it is the sub-clause influence the main clause,the usage of 完成式 is perfect!

關於第二點, 看了但不知是什麼意思?

是不是說:  所以--用現在式, 因為--就要用現在完成式,(不能用過去式)

有這樣的理論是嗎?

那位能幫忙comfirm一下?

嚴重3Qx..

ustchero

这题个人认为

如果A 改成 were found to have increased difficulty 是最合适的

因为原题没有明显的现在完成时时间标志，而且have been found 用现在完成时 表示 持续的发现动作 不如用 were found

rockmax

以下是引用ustchero在2007-11-29 7:03:00的发言：

这题个人认为

如果A 改成 were found to have increased difficulty 是最合适的

因为原题没有明显的现在完成时时间标志，而且have been found 用现在完成时 表示 持续的发现动作 不如用 were found

agree

but why choose B,   ?     Why is ' have been found' ?

flavorflave

以下是引用顾风在2006-5-27 14:20:00的发言：

补充：difficulty 与in　连接时为不可数名词。

与with连接时用 difficulties

能做一下补充嘛？i'm not fully convinced, i still don't see why we can't use difficulties. it's unstated in the question whether it's one difficulty or many difficulties. THANXXX

lijiahui0422

过去时是不能选的，除非以前是现在不是，而这个地方用完成时和现在时的区别不太大，用现在时也可以，但过去时不行

zxygtx

I think the main fault is "increasing difficulty", the adj. form of increase which modify n. in front of the n. should be increased, rather than incresing. Thus C & D are eliminated.
Moreover, the question is only talking about one kind of difficulty, thus options which use difficulties should be eliminated. Namely, we could only choose B.