英语：用适当的连词将下列句子合并起来

1,(After) Mrs Smith talked to him.Simon studied even harder.在.之后
2,Food goes bad easily in summer.(So) It is put in the refrigerator.所以
3,You have to leave now (so that) you can catch the early bus.为了,以便
4,The students still had their sports meeting (though) It ws raining.尽管
5,You have time tomorrow (and) We'll wait for you at the school gate.在这里充当一个连词,没意义.
6.They have known each other (since)They were very young.自从
7.I saw a purse on the ground (when)I was walking in the street.当.时

after
so
so that
while
if
since
when

after
so
even
if
even though
when

哦

After So so that though and since when