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 |
Some animals in _____ wild are now in ______ great danger of disappearing because of human activities.
| A．the, / | B．a, a | C．the, the | D．/, the |
--- Have you moved into the new house?
--- Not yet. The walls ______.
| A．were painted | B．were being painted | C．are painted | D．are being painted |
---How could you say that?
--- ______. I didn’t mean to hurt you.
| A．I’m really sorry | B．Excuse me | C．That’s all right | D．I won’t regret |
If the opportunity would ______, hold on to it and don’t let it go.
| A．arise | B．rise | C．raise | D．happen |
Last summer I took a course on ______ poisonous gases.
| A．what to deal with | B． how to deal with |
| C．what to be dealt with | D． how to be dealt with |