Peter __ _ come with us tonight, but he isn’t very sure yet.
| A．must | B．may | C．can | D．will |
.Lessons _______ easily were soon forgotten.
| A．to learn | B．learn | C．learned | D．learning |
The ground is _______ with _______ leaves.
| A．covering, falling | B．covered, falling | C．covered, fallen | D．covering, fallen |
The library's study room is full of students _______ for the exam.
| A．busily prepared | B．busy preparing | C．busyly prepare | D．are busily preparing |
The scientists were waiting to see the problem _______.
| A．settle | B．settled | C．to settle | D．settling |
The foreigner tried his best, but he still couldn't make his point _______ .
| A．understand | B．understanding | C．to understand | D．understood |