Ann always stands at the window and waves to_____.
| A．see through | B．see to |
| C．see off | D．see into |
—How did you find him out? —I ______ his name by chance on the list.
| A．came down | B．came about | C．came up | D．came across |
If you ______ talk about it with me, please wait till I finish my work at hand.
| A．can | B．may | C．must | D．should |
Because they usually receive the same score in the exams, there’s often disagreement as to ______ is the better student, John or Mary.
| A．whom | B．which | C．that | D．what |
Some of the drivers were ______ by the police because of their good behavior in the traffic accident.
| A．examined | B．questioned | C．praised | D．punished |
Bad habits, ______ formed(形成), are difficult to give up.
| A．and | B．once | C．for | D．but |