—Has Mary come back yet?—Yes. She has got many books from her elder schoolmates, which __________ 1,000.
The traditional ____________to dealing with complex problems is to break them down into smaller,more easily managed problems.
The English test was so easy that most of the students had no ________finishing it in given time.
Many people ________in old days.
-Do remember to see a doctor tomorrow.-________.
H1N1 flu has become the leading influenza virus in all countries,and _________worldwide have even died from it.