河南省长垣县第十中学高中英语必修二《Unit 3 Computers Reading points》课件
河南省长垣县第十中学高中英语必修二《Unit 3 Computers Reading points》课件第5页

They heard her _____ (唱)an English song at the party last night. He was seen __________ (走进)the office. The students watched the professor _____(做) the experiment. They are made __________ (完成)the homework before 3 0’clock.

sing

to walk into

do

to finish