______aloud so that everyone can hear you clearly.A.singing B.to sing C.sing D.sang 为什么?从哪里看出是祈使句啊？

______aloud so that everyone can hear you clearly.A.singing B.to sing C.sing D.sang 为什么?从哪里看出是祈使句啊？ so .that. so that so...that so that 和so...that..如何区别? so that和so,that 意思 so.that.和.so that.区别 so that与so...that..的不同 in that和so that 英语翻译用上so that 英语翻译关键词：so.that 英语词组 so that 英语翻译用上so that， 英语翻译用上 so that 用so that造句 so.that.意思、同义词, so that等于什么? so that等于什么?