题目

. In the west, people make _______ a rule to send Christmas present to their relatives and friends. A. this              B. that             C. it                 D. the following 答案：C在○里填上“＜”、“＞”或“ ＝”。3×3○3＋3 5×5○15＋5 2×2○30÷545+16○16+45 6×1○6＋1 4×5○3×5+5