—Do you want to study abroad after graduation?— ___ .You know,I don’t want to add to the economic burden of my parents.
The boss appeared ______ the accident and was not surprised at the news.
________ a vocation, and you’ll forget unhappy things
---Why do you look so upset? ---There are so many troublesome problems _____.
The cancer risks ___________ smoking have been well documented.
They are purely __________ weapons, not designed for attacks.