Professor Li always allows his students to voice their opinions in class, ______ sometimes their opinions are not sound.
This is the best way _____ the river from _____ .
Last year, Bob earned _____ his brother, who has a better job.
____ I know, the Chinese team got 51 gold medals in the 29th Olympics.
_____ made us proud was ______more than 98% of our classmates had been admitted to key universities.
She wanted to know _____.