32. It’s important to listen to your teacher carefully in class, so try not to let your mind _________.
| A．lose | B．stop | C．wander | D．Disturb |
Physics is difficult ____.
| A．to be learned | B．to learn | C．to be learning | D．to be learn |
English is too hard __ for some people.
| A．to be master | B．to master it | C．to master | D．master |
It is necessary ___ the magazines in time.
| A．to us to return | B．for us to return | C．to us returning | D．that we had returned |
It is careless ___ such a mistake.
| A．of you to make | B．of your making | C．for you to make | D．for your making |
She woke up, ___ a Young Pioner standing by his bed smiling.
| A．in finding | B．to find | C．finding | D．to have found |