John's success has nothing to do with good luck. It is years of hard work _______has made him a great scientist today.
—Did you have a good night’s sleep,sir? —Oh,exactly.It was such a comfortable bed.I could never have________sleep.
I have a lot of readings________before the end of this term.
Our teacher advised you to________the article that is too long so as to make it fit the space.
I was just talking to my old friend when Mary________.
I used to quarrel a lot with my parents,but now we________fine.