ndfather arrived in Shanghai in 1939, ________, some years later, he became a worker in a firm.

We didn’t enjoy the day the weather was so bad.

Do you doubt ____ he’ll be fired by the school? — No, not a bit. But I doubt ____ he will bury himself into study.

It was not until the early 1950s ______most tape recorders began using plastic tape as they do today.

Jane had just finished her homework ________ her mom asked her to practice playing the violin yesterday.