I want to know ______the thief was caught on the spot.
| A．which | B．that | C．what | D．whether |
Gun control is the subject ________ Americans have argued for a long time.
| A．which | B．with which | C．about which | D．of which |
Only when I left my parents for Italy, ________how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
He is a poorly learned man, but he acts as if he ______.
| A．is | B．were | C．should be | D．seems like |
The purse found on the playground matches the ______ by Mary, so it must be hers.
| A．direction | B．expression | C．description | D．instruction |
If a person has not had enough sleep, his actions will give him _______ during the day.
| A．give away | B．up | C．in | D．back |