There are hundreds of visitors __________ in front of the Art Gallery to have a look at Van Gogh’s paintings.
| A．waited | B．to wait |
| C．waiting | D．wait |
282. Our earth, one planet of the solar system, is only a very small part of the__________.
| A．universal | B．university | C．universe | D．Union |
281. Many hands make light work.__________ is strength.
| A．Union | B．Nation | C．Uniform | D．Unifying |
280. Take on a(n)__________ with you. It looks like raining.
| A．underwear | B．overcoat | C．water-proof jacket | D．Umbrella |
279. The Palace Museum has many art treasures. In this sentence, "treasure" means ____.
| A．precious things | B．money | C．cheap things | D．unimportant things |
278. The road constant improvements can’t keep pace with the increasing ____ .
| A．trucks | B．private cars | C．buses | D．Traffic |