Some passers-by witnessed the car accident ______ five passengers were killed, a baby included．
A．whereB．whichC．thatD．when
— Why do you do volunteer work in the North—West？
— I_____ to improve the lives of the children there through my efforts．
A．was tryingB．have tried
C．am tryingD．tried
I send you my revised catalogue and price list, ______ you may find something that suits you．
A．to hopeB．hoping
C．hopedD．hope
Under the new schedule, teachers of primary and secondary schools must _____each class on time instead of adding extra lessons．
A．cancelB．advocate
C．postponeD．Dismiss
—Hi，Tom．The new iPad6 only cost me 150 dollars．
—Really？It was a real ______．
A．changeB．bargain
C．tradeD．business
Appointed as ____chairman to China,Mr．Xi was determined to serve his country____ heart and soul．
A．an，theB．the；a
C．the；theD．/；/
