i don't konw how to call it in English 等于

问题描述:

i don't konw how to call it in English 等于
i don't konw ——englishmen——it

what call帮人帮到底。①she often helps her mother dothe huose work.=she often _ her mother_the huose work②The boy was very clever ,he could make a model plane alone.=The boy was clever _to make a model plane _ _.③she doesn't want to drink milk now.= she doesn't_ _ _milk now④if you don't study harder,you won't catch up with the others=if you don't study harder,_ _ _the others谢谢1. helps with2. enough by himself3. like to drink4.you'll fall behind