题目

阅读下列短文，从每题所给的四个选项（A、B、C或D）中，选出最佳选项。Dear Lan Lan, I'm now writing to you at Hartsop, a village in the Lake District, a place to have most beautiful scenery（景色）in English couple here to spend Christmas with them. This was planned for overseas students to know British way of life by living with British families. We came two days before Christmas and during our stay, we have had everything we expected. Christmas turkey, Christmas cake, Christmas puddings, Christmas parties and Christmas gifts under the Christmas tree. All are ex解下列方程：（1）3x-7+6x=4x-8；（2）4x-3（20-x）=5x-7（20-x）；（3）=1；（4）=0.75．