将下列单句改为复合句,题目如下,急!
1)I went on an excursion recently. My trip took me longer than I expected.(but)

2)I said to the conductor. I got on the bus.(as)

3)Things got bad recently. He decided to go on a diet.(so...that)

4)He explained that his diet was strict. He had to reward himself occasionally.(so...that)
越快越好，在线等。