______ it is the first choice of many young travelers, Europe is also seen as a wonderful tourist attraction by many old people.
| A．While | B．Unless | C．Once | D．Until |
Being injured in the leg made _______ impossible for him to walk his way home．
| A．that | B．which | C．it | D．One |
E-mails, though _______ exposed to misleading information, are considered far more convenient than traditional letters．
| A．occasionally | B．personally |
| C．smartly | D．Fortunately |
What on earth did you tell her? The __________ on her face suggested that she was more than angry．
| A．impression | B．sight | C．appearance | D．Expression |
His daughter has __________ good knowledge of the English language and this will be an advantage over others in finding __________ proper job．
| A．a, the | B．a, a | C．/, a | D．/, the |
Two years ago, three scientists traveled to the Antarctica to explore a secret world hidden _________ the ice.
| A．among | B．beneath | C．beyond | D．opposite |