Before _______, the machine must be checked.
[ ]
A. using it B. being used it C. being used D. using
_____________, she has done very well at school.
[ ]
A. So far B. Then C. At that time D. up to then
Before _______, the machine must be checked.
[ ]
A. using it B. being used it C. being used D. using
_____________, she has done very well at school.
[ ]
A. So far B. Then C. At that time D. up to then