i helped Tom finsh his lessons对吗?

i helped Tom finsh his lessons对吗? Yesterday I helped Tom -------- his radio. 为什么--------要选mend I helped Tom buy 还是I helped Tom bought 15.— I hear Tom is working hard at his lessons.— but I’m ___ I helped Tom bought a new computer. I helped my friend bill with his ( Tom wasn't revise his lessons last night?哪里有错 Tom ___ to review his lessons before exams. Tom also (w )hard at all his lessons. tom dose badly in his lessons（保持愿意 but he often makes his lessons i Thanks to his kind help,I-----the work in time.finsh /finshe