It was not until the beginning of the twentieth century________to explore space.
| A．did man begin | B．when man began |
| C．that man began | D．then man began |
This is my workmate ,Mr. zhou , but he ________ in New York for 10 years.
| A．has worked | B．worked | C．is working | D．had worked |
He smiled and waved to the crowds _______ him,
| A．waited for | B．waiting for | C．waited | D．waiting |
He has got ________ to manager because of his excellent work in the company.
| A．supposed | B．promoted | C．promoting | D．supposing |
In 1862 the American black people won their struggle____ equal rights after many years’ fighting ________ the white.
| A．against; with | B．for; against | C．with; for | D．for; for |
In modern times, people are facing all kinds of _____ although they are leading a comfortable life.
| A．pressures | B．opinions | C．characters | D．stress |