如题所述
It's important to be careful
Be careful is important
You cannot enter the lab alone.改为祈使句
don't enter the lab alone
应该是Cannot
不是
就是don't
你确定吗?
当然
我大学英语六级都过了,这个不会?
厉害!谢谢你了!
猜你上小学,是吧?
不是,我刚上初一。