Every possible means , but none prove successful.
| A．has tried | B．has been tried | C．is being tried | D．tried |
In a new study of African elephants，researchers havefour distinct characters that are among a group.
| A．convinced | B．identified | C．differed | D．existed |
Mo Yan’s novel，Red Sorghum，was made into a film，won the Golden Bear at the Berlin Film Festival in 1988．
| A．that | B．which | C．what | D．it |
As everybody knows，a person I s，the more things he needs to do tomorrow.
| A．the lazy | B．lazier | C．the lazier | D．the laziest |
Online music providers in China hope to set up a plan that will charge individual users for music
| A．prints | B．projects | C．records | D．downloads |
I didn’t have enough money on me，or Ithat iphone on sale the other day.
| A．would buy | B．would have bought |
| C．will buy | D．bought |