It's colder today than it was yesterday.请问这里为什么要加it was呢,去掉可以吗?

It's so cold today.----Yes,it's much colder than it ( )yesterday. _________________?it's july 11th today. 形容词It's ______ than yesterday.A.four degrees colder today B.colder four degrees todayC.colder today four degrees D.today colder four degrees不要光选答案,能不能说说原因啊! It's ___ colder today than it was yesterdayA a littleB veryC tooD more It's much colder today than___yesterday.A.that of B.thatC.it is为什么 It's much colder today than___yesterdayA./ B.that of C.that D.it is It's cold today,but it will be ____ later on.这里填warmer还是colder. It's ( )colder today than yesterday. A: so B:very C:too D:much 急 谢谢 It's so cold today.Yes,it;s colder than it was yesterday.为什么用was?固定搭配吗? It’s so cold today yes ,it’s（）colder than it was yesterday A some Bmore　cvevr D much It's so cold today---Yes,it's____than it was yesterday.A cold B more cold C more colder D much colder -What's the _____ today?-It's October 6th. It's colder today than it was yesterday.请问这里为什么要加it was呢,去掉可以吗? 对It's April 8th today 中的April 8th回答句式()the ()today?/()()is it today? It was cold yesterday,but today it's _____ colder.A.calm B.silent C.still D.quite Its much colder today than _____ yesterday.A/ B that of C that D it is what's the ( ) today .It is October 6th,英语 It's cold today,but it will be ____ later on.这里填warmer还是colder.--How cold it is today --Yes,but it will be ____ later on.A.warmer B.colder