题目

北半球各地昼渐短、夜渐长的时期是: A.春分日至秋分日                        B.秋分日至春分日 C.夏至日至冬至日                     D.冬至日至夏至日 答案:CWe are invited to a party _________in our club next Friday.  A. to be held       B. held          C. being held       D. holding
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