By serving others，a person focuses on someone other than himself or herself，______ can be very eyeopening and rewarding.
| A．who | B．which | C．what | D．that |
that he was in great danger, Eric walked deeper into the forest.
| A． | Not realized | B． | Not to realize | C． | Not realizing | D． | Not to have realized |
--I'd like some more cheese.
--Sorry, there'sleft.
| A． | some | B． | none | C． | a little | D． | few |
Yesterday she sold her car, ______ she bought a month ago.
| A．whom | B．where | C．that | D．which |
——What’s that noise?
——Oh, I forgot to tell you. The new machine ______.
| A．was tested | B．will be tested | C．is being tested | D．has been tested |
Some children want to challenge themselves by learning a language different from ______ their parents speak at home.
| A．what | B．that | C．which | D．one |