— Mr. Smith was really helpful when you were in financial difficulty during those years.
— Definitely. I can never appreciate his kindness ________.
| A．seriously | B．well | C．enough | D．properly |
She ___ for the professor who was ill.
| A．substituted | B．changed | C．shifted | D．replaced |
Throughout the year over two million people are expected to directly ___ Japan 2005,a series of festivals and performances taking place around the country.
| A．visit | B．participate in | C．involve | D．come to |
---Is Bob still performing?
---I’m afraid not. He is said ___ the stage already as he has become an official.
| A．to have left | B．to leave | C．to have been left | D．to be left |
The scientist ___ his research for a lack of fund.
| A．deserted | B．c anceled |
C．abandoned | D．quilted |
Charles Babbage is generally considered ___ the first computer.
| A．having invented | B． inventing | C．to have invented | D．to invent |