Thats______.A．how did I become a teacherB．how I became a teacherC．how a teacher I becameD．

I wonder how many years ago _______.A.did you father retireB.your father retiredC.has yo

Only when I got there____how badly the crops had been damaged.A: did I realizeB: I rea

Did you know that a task thats interrupted （1)_____ 50% longer and has 50% more mistakes t

－－－ ____？一Because I got a job here,A. How old are youB.When did you come hereC. Wbydoyo

Not until I began to work did I realize how much time I______.A．wastedB．have wastedC．was w

Maybe you will ask my mother how I _____ to become an industrial engineer.A.proposedB