-- Our dreams won’t come true __________ we know what our dreams are.
---______has Tom been a doctor? -----Since two years ago.
Mr. Hu has traveled to six countries _______. A over the years B. in the years C. after the years D. before the years
Though he is _____ at home, but he doesn’t feel ______
He’s gone to the library ,_______ he ?
-----Did you get there by _____bike? -----No, I took _____taxi.