My colleague demanded that I ______the books I borrowed from him.A. returnB.would retur

I have much business that has ____ my answering your letter.

I was so______on my study that I didnt notice the time.A．preoccupiedB．intentC．engrossedD．a

I was so______in my book that I didnt hear the doorbell ring.A．settledB．concentratedC．abso

I love my home－town _____ I spent my childhood .A.whereB.whichC.whenD.that

After five years away in my hometown, I find that 76. __________

I couldn ______ my brother that I was telling the truth.A.convinceB.persuadeC.ensureD.ad