1._____many times,but he still could not understand the prob

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1._____many times,but he still could not understand the problem.
A.Having been taught B.He was taught
C.Although he had been taught D.Being taught
2.She is _____her son's progress in his study.
A.satisfied with B.satisfying with C.satisfied at D.satisfying of
3.It is 9 now.Every pupil_____studying in his classroom.
A.supposes B.is supposed to C.suppose to be D.is supposed to be
4.The living condition_____during the past few year.
A.was raised B.had been risen C.has been raised D.was risen

1.C
2.B
3.D
4.A
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（）many times,but he still could not understand it. ___ many times but he still could not understand it.(tell) ______ many times,he still could not understand it. ___ ,but he still could not understand it ____ but he still could not understand it. ( )many times, but he still could not rem 1.___many times,but he still couldn't understand it. _____scores of times,but he still couldn't understand it. __many times,but he still couldn't understand ____ many times but he still couldn't understand it ________many times,but he still couldn't understand it. 1.__________(tell) many times,he still couldn't understand.