The program is like a window on the world ____ you sit by it and fix your attention on what it shows.
| A．if | B．as | C．while | D．unless |
. He made clear to his workmates that he would leave the company.
| A．it | B．that | C．them | D．this |
According to recent report, one of the rare animals, crocodile, will be in anger of dying out in 2020s
| A．a, / | B．/, the | C．the, / | D．the, the |
Their work other writers ever since.
| A．have influenced | B．has influenced |
| C．influenced | D．influences |
Barcelona is situated the northeast coast, about five hundred kilometers east of the Spanish capital, Madrid.
| A．off | B．in | C．on | D．to |
. You will succeed in the end ______you give up halfway.
| A．even if | B．as though | C．as long as | D．unless |