尽管……还是……       不但……而且……

虽然……但是……       所以……因为……

①坚持每天跑步，____不会影响健康，____还能增强体质。

②____天下着大雨，我们____兴致勃勃地去登山。

③他____能在紧急关头想出许多好办法，是____他平时爱动脑筋。

④____我已经长大了，____小时候的趣事仍让我难忘。

阅读下面短文,从每题所给的A、B、C、D四个选项中选出最佳选项。

    Some families live in small towns,others live in big cities. What happens when a family moves(移居)from a small town to a big city?

  Joe's family lives in a big house with a garden in a small town. The house is on a quiet street with lots of trees. There's only one school in the town. Joe's family usually walks to some near places because the town is so small.

    Joe's mother gets a new job in the city,so the family moves there.

    Now they live in a tall building. There's no garden. They usually drive every day because the city is too large. They can also choose to go by bus. But the streets are busy. At weekends,Joe is very busy. He often reads books in the library and goes to the park. There's a large zoo. He can see many animals with his new friends.

    Joe's life in the city is very different from the life in the small town. He sees more(更多的)people. He goes to more places. But some things are the same. He is with his family. He still goes to school and helps his mother do housework.

移栽幼苗时可在阴天或傍晚进行，并剪掉一部分的枝叶，目的是（ ）