--- What do you think our guests ___________ be doing at the moment?
--- They must be enjoying themselves at the party.
| A．can | B．must | C．should | D．would |
When asked to explain __________ he did to make his students so fascinated with his lessons, the teacher paused and thought deeply.
| A．what was it that |
| B．that what it was |
| C．what it was that |
| D．what was it |
The news has spread all over the country __________ the spaceship succeeded in returning to the earth.
| A．which |
| B．that |
| C．whether |
| D．what |
-How did you find the film The Flowers of War?
-It's very moving. I couldn't __________ my tears.
| A．hold back |
| B．hold on |
| C．hold up |
| D．hold out |
Before my father moved off, he told me again and again that I should __________ the rules and regulations of the school.
| A．respect |
| B．deliver |
| C．observe |
| D．direct |
In this section, we will briefly describe possible ways of reducing the costs and risks __________ in doing this.
| A．involving |
| B．involved |
| C．to involve |
| D．being involved |