— You’ve worked there for half a year. What do you think about your boss?— He is a person who would try his best to ________ his purpose.
. We can’t use the bridge now, because it _______.
. --- Shall we go shopping together this afternoon? --- _______. I will be very busy then.
. ________ the absence of any further evidence the police were unable to solve the murder.
. . The chair looks rather hard, but believe it or not, it is very comfortable _____.
. It was _____ his mother came in _____ to prepare his lessons.