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
________such a heavy loss，the businessman didn’t have the courage to go on.
A．Having suffered B．Suffering
C．To suffer D．Suffered
I’ve worked with children before，so I knew what ________ in my new job.
A．expected B．to expect
C．to be expected D．expects
Generally speaking，prices of daily goods ________ through the Internet are lower than store prices.
A．to buy B．are bought
C．buying D．bought
The country has already sent up three unmanned spacecraft，the most recent ________ at the end of last March.
A．has been launched B．having been launched
C．being launched D．to be launched
