下面是专家给我们同学提出有效学习方面的建议，请你给每条建议选出一个恰当的标题。

小题1:Eat good meals every day. You should eat lots of vegetables and fruit. Don’t eat too much junk food. Go to bed early and make sure you have enough sleep. Do more sports to keep healthy.

小题2: You should finish today’s things on time. Don’t leave them to tomorrow.  Because there still will be a lot of things to do tomorrow.

小题3:In school, don’t feel that something is difficult or boring. You should join in all kinds of activities. You should ask questions and answer the teachers’ questions more actively.

小题4:Don’t spend your weekends just playing computer games or watching TV. Use the time for reading, exercising and thinking. If others ask you to do other things, just tell them you have plans.

小题5:If you are not good at subjects. You should work harder to get better results. Make goals to learn better.

A．Take steps little by little.

B．Plan Your Weekends

C．Do Today’s Work Today

D．Make Learning GoalsE. Keep in Good Health

F. Be Active in School

孙某收入较高，但是爱炫耀。孙某购得一台价值两万元的索尼笔记本电脑。遂拿着电脑在李某和章某面前炫耀，而且还讥笑其二人是穷光蛋，一无所有。李某和章某感到自尊受到伤害，遂一起商量乘孙某外出不在家时，到孙某家窃取其笔记本电脑。当晚凌晨两点钟由李某在门外放风，章某人室行窃，在窃得该手提电脑及定期一年的存折一个(本金一万元，年息5％)后又从床下盗得袁世凯登基所戴皇冠一顶，及装有子弹的手枪一只。
章某行窃的过程中，看到床上躺有一人，误以为是孙某的老婆，遂扑到床上企图 * * 淫，但是李某在门外等待时间过长，遂敲门催促章某赶紧离去，章某这才仓促出走，并顺便朝躺在床上的人摸了几下。实际上床上躺的是孙某13岁的儿子，但章某并不知情。在返回的路上，章某告诉李某他还窃取了定期存折一个、手枪一只、皇冠一顶。李某先是一惊，后又说“反正已经拿出来了，就这样吧”。因章某爱枪，枪就分给了章某。后章某听说赵某要报仇杀人，急须枪支，就把该枪以两万元的价格卖于赵某。皇冠也归丁章某，后被章某赠于一外国人。电脑分给李某，被李某以一万元卖给钱某。孙某因发现存折丢失，即到储所查询，发现两个一万元的存折均未被取走，就办理了挂失手续。
请根据上述案情回答以下问题：

章某的行为构成下列哪些罪( )

A．盗窃罪

B．盗窃枪支弹药罪

C．销赃罪

D．非法向外国人赠送珍贵文物罪