His sister left home in 1998, and _________ since then.
| A．hadnotbeenheard | B．hasnotbeenheardof |
| C．hadnotheardof | D．hasnotheardof |
相关试题
in the qucue for half an hour ,the old man auddenly realized he had left the cheque in the car.
| A． | Waiting | B． | To wait | C． | Having waited | D． | To have waited |
-------Do you have enough to ________all your daily expenses?
--------Oh yes, enough and to spare.
| A．cover | B．spend | C．fill | D．offer |
Some parents are just too protective. They want to ______ their kids from every kind of danger, real or imagined. 
| A．spot | B．dismiss | C．shelter | D．distinguish |
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