It is reported that the police will soon ____ the case of two missing children. 
| A．look upon | B．look after | C．look into | D．look out |
. —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 |
—Did you sec anyone coming into the building?
—No, I didn’t
—______?
—There is no doubt about it.
| A．OK | B．Sure | C．Really | D．Is that so |