at last he s() in swimming across the river

at last he s() in swimming across the river 请问老师 对He's swimming across the river.中的river和across the rive he is swimming across the river改错 请问He was so ___ in swimming across the river.(succeed)如何做? He swam across the river last year.为什么用across He is swimming across the river.用across the river提问英语句子 He had some__________in swimming across the river.(succeed) He was _______in swimming across the river.(succeed) The young man ____ in swimming across the river yesterday. look!he is ____ the river A.swimming across B.swimming throu The boy is swimming( across the river). let's ____(go）swimming in the river what's ____( he) e-mail