Ⅰ.单句语法填空
1．Do you know anything about the accident happening/ that happened(happen) in the village yesterday.
2．The tree there，measuring(measure) over 80 metres was planted 1，000 years ago.
3．The old man's job is looking(look) after his grandson after he retired from work.
4．I found there were some children swimming(swim) in the lake when I reached it.
5．The question being discussed(discuss) now at the meeting is very significant.
6．People are surprised to see that the eel has been marked up to an astonishing (astonish) price.
