＿＿＿＿your father at work the day＿＿＿yesterday﹖ A: Was; before B: Is; before C: Was; after D: Is; after ．
＿＿＿＿your father at work the day＿＿＿yesterday﹖ A: Was; before B: Is; before C: Was; after D: Is; after ．
____ your brother at work the day before yesterday?
____ your brother at work the day before yesterday?
（）your father at work the day（）yesterday. A: Was; before B: Is; before C: Was; after D: Is; after
（）your father at work the day（）yesterday. A: Was; before B: Is; before C: Was; after D: Is; after
_____________ work has to be done before the plant goes into operation.
_____________ work has to be done before the plant goes into operation.
There are _____ work to be done before the building can be used for living.
There are _____ work to be done before the building can be used for living.
I ______ (finish) all my work before I ______ (leave).
I ______ (finish) all my work before I ______ (leave).
You improve your English before going to work in America.
You improve your English before going to work in America.
He said he could finish his work before supper．
He said he could finish his work before supper．
______ so many people put of work as today. A: Before have never there been B: There have been never before C: Never before have there been D: Have there never before been
______ so many people put of work as today. A: Before have never there been B: There have been never before C: Never before have there been D: Have there never before been
The Parkers bought a new house but _____ will need a lot of work before they can move in.
The Parkers bought a new house but _____ will need a lot of work before they can move in.