Definition: to make a knot in a piece of string, rope, etc. Level: B1
她系了围巾。
She ___tied the scarf.
你能帮我系一下这根绳子吗？
Could you ___tie this piece of string for me?
系好你的鞋带，否则你会绊倒。
___Tie your shoelaces, or you'll trip over.
