_________ no doubt that a green campus plays an important role in the growth of students, both physically and mentally.
| A．It is | B．There has | C．There is | D．It has |
It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)
| A．that | B．how | C．when | D．why |
I am afraid he's more of a talker than a doer, which is ________ he never finishes anything.(2011·山东)
| A．that | B．when | C．where | D．why |
________ Barbara Jones offers to her fans is honesty and happiness.(2011·北京)
| A．Which | B．What | C．That | D．Whom |
The Chinese in many places of the world ________ the old tradition.
| A．keep on | B．keep up |
| C．keep up with | D．keep in |
I am considering ________ him tomorrow because he is considered ________
great contributions to science cause.
| A．to visit；to make | B．visiting; making |
| C．to visit; having made | D．visiting; to have made |