（全国II 20）. Mr. Black is very happy because the clothes made in his factory have never been .
| A．popular | B．more popular | C．most popular | D．the most popular |
One is not born a ____; one becomes a _____.
| A．genius; talent | B．talent; genius | C．genius; genius | D．gift; talent |
The professor said he wouldn’t attend the opening ceremony ____.
| A．unless was invited | B．until inviting | C．without inviting | D．if not invited |
. —He hasn’t gone to the office up to now. —Well, he ____.
| A．should | B．ought to | C．ought to go | D．ought to have |
Mr. Black, ___ born in Kentucky, lived and practiced law in Missouri.
| A．was | B．he was | C．although | D．who he was |
. All substances, ___ solids, liquids or gases, are made up of entirely atoms.
| A．whether they | B．whether | C．whether are they | D．whether are |