You've made great progress in your studies of English,haven't you?

还有很多仍需要完成
remain
[ri5mein]
vi.
保持,逗留,剩余,残存
remain
re.main
AHD:[r¹-m³n“]
D.J.[ri6mein]
K.K.[r!6men]
v.intr.（不及物动词）
re.mained,re.main.ing,re.mains
To continue in the same state or condition:
保持不变：继续保持同一种状态或情况：
These matters remain in doubt.
这些事情仍然值得怀疑
To continue to be in the same place; stay or stay behind:
留下：逗留在同一地方；停留或者留下：
We are remaining at home.
我们留在家里
To be left after the removal,loss,passage,or destruction of others:
余留：在其他事物移走,丢失,走开或毁坏之后仍留下来：
Only a few trees remain.See Synonyms at stay 1
只留下了一些树参见 stay1
To be left as still to be dealt with:
尚待：剩余的仍需要处理的：
A cure remains to be found.
尚待发现的疗法
To endure or persist.
持久或坚持