If we don’t take some measures to protect this kind of plant, it will ____ soon.
| A.die out | B.die down | C.die from | D.die of |
This is a simple idea, but that is hard to put into practice.
| A.one | B.it | C.that | D.those |
– Who is the man standing there?
– If you know, his name is Mike.
| A.must | B.can | C.may | D.would |
One solution to this problem now is sustainable development.
| A.discussed | B.discussing |
| C.to be discussed | D.being discussed |
Wind power units are placed ______ there is a lot of wind.
| A.where | B.when | C.which | D.that |
Recently, there a boom in population movements.
| A.is | B.was | C.has been | D.had been |