Parents always _________ great importance to education. They will do their best to give their children that priceless gift.
| A．attach | B．pay | C．link | D．apply |
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 |
. The purpose of the research had a more important meaning for them than ____.
| A．ours | B．those of ours | C．it had for ours | D．it did for us |