几道语言学题求指教～能稍微讲解下更好啦～非常感谢

几道语言学题求指教～能稍微讲解下更好啦～非常感谢
判断: 1. the syntagmatic/paradigmatic distinction applies to phonology.
2. The source domain in 'Time is money' is 'time'.
3. ellipsis is a linguistics device to realize discourse cohesion.
选择 4. Which of the following is not a minimal pair
A.man men B.fly flee C.child chilly D.drop droop(这个最小对比对是怎么分的啊,没发现什么规律呢)
5. A focal point of SLA research has been the nature and development of L2 learners'＿language
a.second b.first c.foreign d.inter
sla是什么啊
填空 5.'ceive' in the words 'receive' 'perceive' 'conceive' is a bound r＿morpheme. 是root吗?