hints:

序號(hào)不用寫(xiě)~

※從本期開(kāi)始為寫(xiě)作句型~

be supposed to hold fast to bear in mind that
be supposed to 在寫(xiě)作和口語(yǔ)考試中都可以用來(lái)代換should的美語(yǔ)極常用表達(dá) hold fast to... 牢牢地把握住... bear in mind that... 牢記...