根據(jù)上句完成下旬，使兩句話的意思相同或一致，每空一詞。
1. Our city has changed greatly in the last three years.
Our city is quite_________________ what it was three years ago.
2. We have to water the young trees often, or they\'ll die.
The young trees will die________ they are often________.
3. There is only a chair in the room.
There is______________.      a chair in the room.
4.I was late for school because of the traffic accident.
The traffic accident ________me ________ getting to school on time.
5. The books on the bookshelf are not difficult to reach. __________   to reach the books on the bookshelf.