_________, some famous scientists have the questions of being both careful and careless.

it’s already 6 o’clock I have to be off foran appointment –OK ________

The city of Jilin is beautiful all the year around, in winter The Jilin rime attracts plenty of tourists

___________ made the school proud was ___________ more than 90% of the students had been admitted to universities.

________ do you study for tests —I work with my friends.