How did it _________ that all theflowers died —I had forgotten to water them.

I heard your grandpa used to be a teacher. — Yes. He was a Chinese teacher ______.

What’s your plan for this wintervacation– I’ll take an express train to Dalian formy holiday ______ school ends．

下列词语中划线字的读音完全正确的一项是（ ）

Do you need myself.