---I’m afraid I can’t finish the book this week.---___.
Now that the children have___, we should let them free to choose their style of living.
Our duty is to ______ their country against both domestic and foreign enemies’ attack.
-Bob failed in the exam again. -He ________ it;he never worked hard.
______ people are standing outside the office. _____ people there is at least over 1,000.
You should always _____ your conclusion _____ careful research.