选择can,beableto,manageto填空下面句子
1.BObisonly11monthsold,buthe______standupbyhimself
2.Look!He______talkwithoutdrinkingallthetime.
3.I______standonmyheadwhenIwasachild.
4.--Cansheswimyet?
--No,butshe______swimin3month'stime.
5.--OhmyGod!Iamlateforschoolagain.IthoughtI______catchthebus.
--Eh?Didn'tMarygetonthesamebuswithyou?Butshe______gettoschoolontime.
6.Althoughit'sverydifficult,we______tofinishthisjobyesterday
还要搭配句子时态!!!!!