______with so much trouble, we failed to complete the task on time.
| A．Face | B．Facing | C．Faced | D．To face |
For most informal dinners, you should wear comfortable and ______ clothes.
| A．official | B．formal | C．casual | D．proper |
Johnson would have faced the music but he ______ doing things like that.
| A．had stopped | B．stopped | C．was stopping | D．has stopped |
How can they learn anything ______ they spend all their spare time watching television?
| A．when | B．though | C．while | D．before |
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 |
This practice satisfies people of high moral standards psychologically and materially and ______ encourages other people’s enthusiasm.
| A．on the contrary | B．in the meantime | C．from time to time | D．all at once |