All the workers are working hard to create _____ we hope will be the best means of transport in the 21st century.
A．what B．where C．which D．that
How I wish I _____ history when I was in university.
A．study B．studied C．would study D．had studied
The student said there were a few points in the essay he _____ impossible to understand.
A．had found B．finds C．has found D．would find
Mr. Smith, there is a man at _____front door who says he has _____important news for you.
A. the; an B. /; / C. the; / D /; an
Process has been very smooth. ______, we are not confident that it will be completed on time.
A．Therefore B．Besides C．Though D．However
______ Chinese international medical relief team was sent to the 7.0-magnitude quake-hit areas in ______Southwest China's Sichuan province the moment it happened.
A．A; the B．The; the C．A; / D．The; /
