The car _______ in Germany in the 1960slooks old now.
| A．produced | B．producing |
| C．to produce | D．which produced |
Many of them turned a deaf ear to his advice, __________ they knew it to be valuable.
| A．as if | B．now that | C．even though | D．so that |
It is difficult for us to learn a lesson in life __________ we’ve actually had that lesson.
| A．until | B．after | C．since | D．when |
__________ he had not hurt his leg, John would have won the race.
| A．If | B．Since | C．Though | D．When |
I won’t call you, __________ something unexpected happens.
| A．unless | B．whether | C．because | D．while |
He was told that it would be at least three more months __________ he could recover and return to work.
| A．when | B．before | C．since | D．that |