1.He found _____ very difficult to understand what the foreigner said.

1.He found _____ very difficult to understand what the foreigner said.
答案是“it”,为什么不能是“it is”呢?
2.【用所给词适当形式填空】
① The big fire made his face _____(terrified)
答案是terrifying,为什么?
② Just a moment Mr Chen _____(tell)us the result
答案是will tell,为什么?