Lucy practiced______English songs last weekend A.sing B.sings C.singing D.sang
问题描述：
Lucy practiced______English songs last weekend A.sing B.sings C.singing D.sang
Maria spent two hours______the piano last night.
A.played B.toplayC.playing D.plays
答
Lucy practiced singing.
Maria spent 2 hrs playing.为什么是ing形式，而不是过去时态？因为一个句子只能有一个动词。Practice 是一个动词。因此，星必须加ING。 第二句相同。此外，spend+verb-ING