The conference will be put off until next week, _______ we will have made all the preparations.
| A．which | B．in which | C．when | D．on which |
--- Better get down to your work．Jack．
--- __________ ．
| A．It’s my pleasure | B．Suit yourself |
| C．Mind your own business | D．You’re welcome |
A ship in the harbor is safe，but that’s not __________ ships are built for．
| A．what | B．that | C．why | D．how |
In Europe unemployment hit a new record with young people __________ it harder to get jobs．
| A．to find | B．finding | C．having found | D．found |
Nelson Mandela is，__________ the greatest man of the 20th century，certainly among the most extraordinary leaders．
| A．if there | B．if any | C．if not | D．if so |
--- Look，someone has left the fridge door open again．
--- Well．It __________ me，Morn．
| A．isn’t | B．won’t | C．hasn’t been | D．wasn’t |