----Who’s the man sitting under the tree? ----I don't ___ this man, but I’ve ___ him.
| A．know of, heard about | B．know, heard about | C．know, heard | D．know of, heard |
My parents live in a small village. They always keep candles in the house __________ there is a power cut.
| A．if | B．unless | C．in case | D．so that |
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 |