unit 1 friendship i. fill in the blanks with words and expressions in this unit. 1. add up, add up to, add to, add…to ① the time i spend in communicating every day __________ two hours. ② the piece of music ___________ our enjoyment. ③ to make sure the result was correct, she __________ the figures again and again. ④ if the tea is too strong, __________ some more water ________ it. 2. suffer, suffer from ① it is miserable to see those patients ___________ from poverty and disease.
