Notallbirdscanfly,______doallbirdsbuildnests.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
重写句子：Alanpassedthetest.Alanhadstudiedhard.Alanhadunderstoodthematerial.(complexsentence)
Iwilldotheclearingifyousee_____thelunch.
改写病句：WhiledrivingonBlueberryAvenueyesterdayafternoon,atreefelltowardJack
