--has jack finished his homework yet?--i've no idea,but he___it this morning A.was doing

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• --has jack finished his homework yet?--i've no idea,but he___it the whole afternoon
• 1.China（ ）the bid to host the the World Expo 2010.A.has won B.won C.in winning D.wins2.The old man always ( ) thick glasses and works very hard.A.puts on B.takes off C.dresses D.wears 3.（ ）the center of Australia（ ）the desert which seems to go on forever.A.Has;covered with B.Is;covered with D.Did;cover with4.---Has Jack finished his homework yet?I am waiting for him.---I've no idea.But he ( ) on it the whole afternoo.A.is working B.was working明天我就要期末考
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