Windows on Levels 1, 2 and 3 have window sills（窗台） at 900mm above the floor, while windows on Level 4 are floor to ceiling（天花板）.

Although we have learned English for 3 years,we still have difficulty （） the new words. We have received your letter of 23 November ______ reply to ours of 12 November. I have found some articles _____ the harmful effects of drinking. (2004,12 A) 3. I have to adapt to the new environment as _____3______ as ___4________. Write advice for someone with these problems. I have a stomachache.__________________ 2. I have a fever.______________ 3. I have a cough._________________ 4. I have a headahce._________________ 1，3，3，12，（）,80 3，6，6，9，9，12，12，（） 算式12÷4＝3，可以表示为“12里面有3个4”（） 1/3 3 1/12 4/3 3/64 （ ） He have not eaten anything for 3 days. He ____ hungry. The diamond-shaped rice cakes have 3 colors, generally_______. 3，5，2，2，-3，（ ），-12 1/3，7/12，1，19/12，（） 3, -2, 11, -12,（　　） 3. Have you ever been to Hangzhou, ________ is famous for the West Lake. Both Pit No. 3 and Pit No. 4 have not been completed. 1/3，3，1/12，4/3，3/64，（） -3,12,25/3,42/5,( ) 1，3，3，9，12，36，42，（） 1，3，3，6，7，12，15,（）