選擇can, be able to, manage to 填空下面句子
1.BOb is only 11 months old, but he ______ stand up by himself
2. Look ! He ______ talk without drinking all the time.
3. I ______ stand on my head when I was a child.
4. --Can she swim yet?
--No, but she ______ swim in 3 month's time.
5. --Oh my God! I am late for school again. I thought I ______ catch the bus.
--Eh? Didn't Mary get on thesame bus with you? But she ______ get to school on time.
6. Although it's very difficult, we ______ to finish this job yesterday
還要搭配句子時(shí)態(tài)?。。。?！