Clinical evidence began to ___, suggesting that the new drugs had as wider range of useful activities than had been predicted from experiments in animals.
| A．operate |
| B．strengthen |
| C．approve |
| D．accumulate |
Was it _____ she heard with her ears _____ really made her frightened？
| A．what；that | B．it；that | C．that；which | D．what；／ |
Is this factory _____ you visited the other day？
| A．the one | B．that | C．where | D．when |
Never _____ time come back again.
| A．has lost | B．will lose | C．will lost | D．lose |
Can _____ be in the desk _____ you have put my letter？
| A．it；which | B．I；Where | C．you；in which | D．it；that |
Time should be made good use of ____ our lessons well.
| A．learning | B．learned | C．to learn | D．having learned |