People should not cross the street ______ the traffic lights turned green.A. when B. until C. after
The boy with two dogs was sleeping when the fire___________.
–Could you please tell me _____________?–Yes, she came to teach here just last week.
When she came back home, she found her goldfish ______ on the floor.
The______ talk made all of us ________.
Tom has difficulty Chinese, so he often asks me advice.