Why didn’t you take part in the school reunion （团聚、重聚）yesterday? –I’m sorry, but not until last night ________ of it.

We all think___ interesting to climb the mountain in such a sunny day.

The traffic problem we are looking forward to seeing ________should have attracted thelocal government’s attention[ ]

The environment is becoming worse and worse. We must stop the pollution __________ longer. [ ]

I have a brother two sisters, I don’t have a cousin.