So heavy is his _______ that he is as busy as a bee, unable to spare(抽出) even a day for his family in a month.
| A．block | B．source | C．schedule | D．attitude |
_____ 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 |
No sooner had we reached the top of the hill _____ we all sat down to rest.
| A．when | B．then | C．than | D．until |