________，John returned to school from his hometown.
A．The summer vacation being over
B．The summer vacation is over
C．Because the summer vacation over
D．After the summer vacation being over
—We didn’t find the Blacks ________ the lecture.
—No one had told them about ________ a lecture the following day.
A．attending；there being B．to attend；there to be
C．attended；there be D．attend；there was
His first book ________ next month is based on a true story.
A．published B．to be published
C．to publish D．being published
In order to improve English，________.
A．Jenny’s father bought her a lot of tapes
B．Jenny bought a lot of tapes for herself
C．a lot of tapes were bought by Jenny
D．a lot of tapes were bought by Jenny’s father
The global warming is more and more serious，for which human beings ________.
A．are blaming B．are to blame
C．are going to blame D．are to be blamed
Taking this medicine，if________，will of course do good to his health.
A．continued B．to continue
C．continues D．continuing
