People should not cross the street ______ the traffic lights turned green.A. when B. until C. after
—Can I help you?—I’d like a cup of coffee __________milk __________it, please.
—What colour __________your shoes?— __________ black.
Robert is __________ brother. __________ is in Class Two.
I haven’t got __________ oranges __________ bananas.
There __________ a pen and two pencils on the desk.