He had to sell his luxury car, ________ his company was in debt.
| A．before | B．until | C．while | D．for |
The ability to store knowledge makes computers different from every other machine _____ invented.
| A．ever | B．thus | C．yet | D．as |
_____ quite recently, most mothers in Britain did not take paid work outside the home.
| A．Before | B．Until | C．From | D．Since |
I’ve already told you that I’m going to but it, _____.
| A．however much it costs | B．how much does it cost |
| C．however does it cost much | D．no matter how it cost |
You will want two trees about ten feet apart, from ______ to suspend your tent.
| A．there | B．them | C．which | D．where |
The reason for the party was _____ it was Sue’s birthday.
| A．because | B．that | C．because of | D．due to |