代词:人称、物主、反/自身、指示、相互、疑问、不定代词As they were classmates, ________ was no wonder that they should do the work in the same way
--- You should have thanked her before you left. --- I meant ______, but when I was leaving, I couldn’t find her anywhere.
He ______ persuade his father to give up smoking but his father didn’t.
The reason _______ his going to Britain was ______ he got a new job there.
_____ with the size of the whole earth, the biggest ocean does not seem big at all.
People often use plastics to ______ wood or metal.