2道单选题The missing boy was last seen ___ near the river.A.playing B.to be playing C.play D.to play 为什么不选B?He was often heard___ the International.A.sing B.to sing C.sang D.to be singing 为什么?能不能添singsing?这两道题感
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2道单选题The missing boy was last seen ___ near the river.A.playing B.to be playing C.play D.to play 为什么不选B?He was often heard___ the International.A.sing B.to sing C.sang D.to be singing 为什么?能不能添singsing?这两道题感
2道单选题
The missing boy was last seen ___ near the river.A.playing B.to be playing C.play D.to play 为什么不选B?
He was often heard___ the International.A.sing B.to sing C.sang
D.to be singing 为什么?能不能添singsing?
这两道题感觉差不多啊.
2道单选题The missing boy was last seen ___ near the river.A.playing B.to be playing C.play D.to play 为什么不选B?He was often heard___ the International.A.sing B.to sing C.sang D.to be singing 为什么?能不能添singsing?这两道题感
1.see somebody do/doing 看到某人在做某事,用playing表示最后被人看到时,正在河边玩,选A
2.hear somebody do/doing听到某人做某事,
可以用singing,或是to be singing,选D
他经常被人听到在唱国际...（ing形式表示习惯性的行为）