1．The disease, connected (connect) with smoking, is not easy to cure.
2．Several middleaged passengers fell into the sea.Unfortunately (fortunate), none of them could swim.
3．John and Tony are close (closely) friends and they have been keeping in contact closely since their graduation.
4．The problem of global warming is serious.As a result, the sea levels have risen a little.
5．Plants are very important.This is because plants can make food from air，water and sunlight.
6．I was struck by the similarities (similar) in their early lives.
7．I feel very sick on the bus; can you exchange the seat with me?
8．If you are not feeling well, you shouldn't go to crowded (crowd) places.
9．(2019·石家庄一中期中)I have no idea whether the book is of great help (helpful) to your English study.
10．The waste water is being poured into the river, which makes it seriously polluted (pollute)．
