Hotels fill up fast during the busy tourist season, __________it is necessary for tourists to make reservations in advance.
| A．or | B．so | C．for | D．but |
Because of the financial crisis, days are gone ________ local 5-star hotels charged 6000 yuan.
| A．if |
| B．when |
| C．which |
| D．since |
The meeting ________ a few weeks after he had arrived in America.
| A．occurred |
| B．has happened |
| C．took place |
| D．broke out |
________ is no possibility ________Bob can win first prize in the contest.
| A．There; that |
| B．It; that |
| C．There; whether |
| D．It; whether |
I have no idea ________ he will come back.
| A．where |
| B．when |
| C．what |
| D．which |
The rescue team made every ________ to find the missing mountain climber.
| A．force |
| B．energy |
| C．effort |
| D．possibility |