找出与中括号内单词意义相反的单词.
1. [cruel] a.dull b.religious c.benevolent d.restless
2. [conceal] a.discharge b.disclose c.reject d.vanish
3. [humble] a.proud b.cheap c.huge d.firm
4. [burden] a.scrape b.unload c.tangle d.connect
5. [sow] a.harvest b.plant c.bless d.strain
