单项选择题
We must ______ a solid, foundation for the development ...
单项选择题We must ______ a solid, foundation for the development of our heavy industry.
The headmaster wanted the classroom building ______ as ...
单项选择题The headmaster wanted the classroom building ______ as soon as possible.
Had the doctor been available, the child ______ .A．coul...
单项选择题Had the doctor been available, the child ______ .
