单选题：A On the contraryB In a similar wayC On the other handD Cons

One difference between a corporation and a partnership lies in__________.A．A sca

What does "the grammar of any culture" refer to in the first paragraph?_________

I am heartily grateful to your help．A．helpful B．hateful C．delightful D．thankful

Independent language learners rely on themselves __________．

When a liquid boils, it becomes a gas. A．A vapor B．B danger C．C fuel D．D bubble