单项选择题

Only when he returned from the exchange program______how much he enjoyed it.
A.he realized
B.he had realized
C.did he realize
D.had he realized

A.A.he
B.he
C.did
D.had
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单项选择题
It was three years ago that I first met Lisa, when she______at a computer company.A.has workedB.has been workingC.was workingD.is working
A.A.has
B.has
C.was
D.is
单项选择题
______money did the couple have to pay for the new house that they had no choice but to turn to their parents for help.A.So muchB.Too muchC.Too littleD.So little
A.A.So
B.Too
C.Too
D.So
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