it's time for us to go to school

it's time for us to go to school It's time for us to go to school,so let's( )the promblem and It's time (for还是to) go to school it's time for him [ to go ]to school It's() for us() get to school on time It's time for go to school 哪里错了 It's time to go to school It's time to go to school.It's time for lunch翻译 It's time for school和It'stime to go to school的区别 It's time for you to go to school.此处为什么用for不用to? it's time for ------home.let's ---------.A.us to go,go B.me It's time for me to go to school 可以 不加to吗