关于JOIN命令，

用编辑多线段(PEDIT)命令中的Join选项,既可以将相连的直线或圆弧合并到一条多义线中 Will you join us at the party next Sunday–I will join you if I ________ my work on Saturday. I want to join the Is Mary（）to join in us?   Is Mary（ ）to join in us？   Will you join us in the discussion —Well, I won’t join you unless Wang Lin ________ too. If you wish to join a fraternity or sorority, it’s by invitation only and you may join more than one. Shall we ask Diana if she’d like to join in the party tonight—________ I’d like her to join us How to join in the U 校园？ Come and join us with your _____. Professor Brigham agreed to join our club. Several others in his school also agreed to join our club. The boy is ____ young to join the army (参军). [ ] The child is ____ young to join the army. [ ] His brother is _______ to join the club. — Shall we join in the Computer Club?— _______________________. When did China join WTO（） --Why not join us in the discussion? --_________ --Why not join us in the discussion?--_________ 下面关于命令“mv”命令，说法错误的是（）。 _____ do they want to join?—Music club.[ ]