The boy with two dogs _____ in the yard when the earthquake rocked the city． A．is playing B.
Theboywithtwodogs_____intheyardwhentheearthquakerockedthecity．A．isplayingB．wasplaying...
The boy with two dogs _____ in the yard when the earthquake rocked the city． A．is playing B．was playing C．are playing D．were playing
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| B |
| 根据时间状语从句可知主语为过去进行时态，主语为这个男孩，第三人称单数，故选B. |
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