【单选题】
______，the boy worked out the problem quickly．
①
As clever he is
②
Clever as he is
③
He is as clever
④
As he is clever
【单选题】
It turned out that the children were not _____for the accident.
①
to blame
②
to be blamed
③
to be blaming
④
to have been blaming
【单选题】
____ find out what had happened.
①
Not until he woke up did he
②
Not until he woke up he
③
Until he woke up did he
④
Until he woke up he
【单选题】
-- Madam, do all the buses go downtown?--______________
①
：Wow, you got the idea.
②
：No, never mind.
③
：Pretty well, I guess.
④
：Sorry, Im new here.