题目

 根据句意，用所给单词的适当形式填空。 1. It’s my first time _________(spend) my holiday in Guilin. 2. Tom is clever. He taught _________(he) Japanese when he was young. 3. It’s _________(luck) for him to lose  his wallet on the playground. 4. ---Where’s you father?       ---He _______(make) the kite for me. 5. The love from our parents is the _________(deep) love in the world.设{an}是任意等比数列，它的前n项和，前2n项和与前3n项和分别为X，Y，Z，则下列等式中恒成立的是（ ）A．X+Z=2YB．Y（Y-X）=Z（Z-X）C．Y2=XZD．Y（Y-X）=X（Z-X）