To their deep sorrow, there was nothing left ______ the city except ruins after the violent earthquake, which turned the whole city into a silent world.
| A．in | B．of | C．for | D．with |
We ________ such great achievements without your efforts. Thanks a lot.
| A．can’t have made | B．couldn’t have made |
| C．were unable to make | D．are unable to make |
A study ________ in the USA in 1977 showed that the chemical ASA in aspirin could prevent a stroke.
| A．carrying out | B． carried out | C．working out | D．worked out |
It’s obvious that the Beijing Olympic Gamesa great success．
A．kept B．showed C proved D．remained
Scientists ____ thousands of chemicals before they decided on the right one in the end.
| A．tried out | B．found out | C．worked out | D．turned out |
The deserted island is only _______ by boat.
| A．suitable | B．practical | C．available | D．accessible |