25. Willie has complained to the sales manager about the PC he bought _____ screen exploded for no reason.
| A．which | B．where | C．whose | D．when |
The young lady was careful _________.
| A．not repeating her mistake | B．not repeated her mistake |
| C．to not repeat her mistake | D．never to repeat her mistake |
The bridge is so important to the people here that once ________ it must be carried out without delay.
| A．designs | B．having designed | C．designing | D．designed |
Though they had a meeting yesterday, there is still much that remains______.
| A．to solve | B．to be solved | C．solving | D．solved |
The students expected there ________ more free time before the test.
| A．is | B．have been | C．to be | D．being |
They tried to prevent the damage ________ their cattle.
| A．from protecting | B．protecting | C．protect | D．to protect |