He_____in the factory since he left school ten years ago.A.worked B.was working C.has worked

the rate factor 请问：“The plus factor When he was in the countryside,he_____in the middle of the yard ,talkingand He_____in the factory since he left school ten years ago.A.worked B.was working C.has worked Where is your father,Mike? He_____in the kitchen.A.cooks B.cooked C.is cooking D.has cooked 他立刻跑回学校,他把杂志忘在教室了.He __________school at once because he_____in the classroom. Look at the elephant!Its bame is Zhuangzhuang.It is from _____.But now he_____in a wild zoo inGuangdong what is the important factor in the development of country Peter loos very upset.Anything wrong?He_____in the exam.It was very difficultA.should have failed B.must have failed C.should fail D.must fail Find the largest prime factor of 91!+90!+89! 新能源电池中的 the fill factor 指的是什么 THE HAMSTER FACTOR AND OTHER TALES OF TWELVE MONKEYS怎么样 The prime number is a factor of 30 and is also a factor of 42 求翻译 factor是什么意思 什么是full factor,push factor factor可数吗?factor 因素, 关于SAT一道数学题prime factor如何理解?m is the greatest prime factor of 38,n is the greatest prime factor of 100,求m+n?不太懂prime factor 的意思.直译过来是主要因素之类的.还是不太理解,特别是将prime factor译成 the factor to的用法the factor to + 名词那么后面如果是动词呢?这个to是介词还是不定式?