.All the students were listening carefully, with their eyes _____on the teacher.
| A．fixed | B．being fixed | C．fixing | D．to fix |
. With the whole village _______, the villagers had to move to higher land, waiting for help.
| A．flooding | B．having flooded |
| C．flooded | D．to be flooded |
The UN does not have its own army. _______, it borrows soldiers from different countries.
| A．Moreover | B．Anyhow | C．Instead | D．Somehow |
. A nature reserve for white-flag dolphins was set up in 1992, _______ boats have been
prohibited from sailing around since then.
| A．where | B．which | C．when | D．what |
It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 years when he entered the company last month.
| A．worked | B．had worked | C．has worked | D．working |
. —Has the conference about building a water-power plant come to an end?
—No, it’s _______. Experts just disagree on some issues.
| A．under discussion | B．under control | C．under consideration | D．under way |