题目

Ms. Steen is our English teacher. She is from England. She began to teach ______last year. But now she is leaving for her country. We are so_____ to see her go because she is a good teacher. We________ a party for her. We think it is the best way to say “Thank you and goodbye”. We ______ to have the party this Saturday. Now , we are preparing for it. Wang Lei and Wei Wei ________ all the teachers. Our Chinese teacher Miss Zhang_______come. Her family is taking a trip to Beijing this weekend. Luckily, the other teachers promised that they _______. Li Ye is writing a thank-you note. We want 已知中，，，设. (1 )用表示； (11)求的单调递增区间.