. I_______such a foolish mistake if I had been a little more ca
reful.
| A．wouldn’t make | B．hadn’t made |
| C．wouldn’t have made | D．didn’t make |
Robert is said ___________ abroad, but I don’t know what country he studied in.
| A．to have studied | B．to be studying |
| C．to study | D．to have been studying |
He made another wonderful discovery, ______ of great importance to science.
| A．which I think is | B．which I think it is |
| C．which I think | D．I think which is |
Was it through Mary,_____ was working at a high school, ____ you got to know Tom?
| A．who; who | B．that; which | C．who; that | D．who; which |
Every time Ashtita tries to break a record, he reaches a point ______ he feels he cannot physically do any more.
| A．where | B．that | C．when | D．which |
The boy talked his mother ________ buying him a home computer.
| A．of | B．over | C．to | D．into |