—Your sister’s plan is not quite practical.Why not try to persuade her to give it up?
—My sister is very stubborn，so it is________to try to change her mind.
| A．by chance | B．in vain |
| C．on purpose | D．for sure |
Finally he reached a lonely island _________ was completely cut off from the outside world.
| A．when | B．where | C．which | D．whom |
The Smiths are praisedthe way they bring up their children.
| A． | from | B． | by | C． | at | D． | for |
at the cafeteria before, Tina didn't want to eat there again.
| A． | Having eaten | B． | To eat | C． | Eat | D． | Eating |
— This is a really lively party. There’s a great atmosphere, isn’t there?
— ________ The hosts know how to host a party.
| A．Don't worry | B．Yes, indeed |
| C．No, there’s isn’t | D．It all depends |
There is no simple answer, _____ is often the case in science.
| A．as | B．that | C．when | D．where |