While prices are rising so fast,many people are working out ways to________their expenses.
- The reason_________ he didn't come was _________ he had to take care of his sick mother.
-"Please __________why you're so late," said his girlfriend.
---- Is there anyone in your class ____ the name of Mary? ----____.
Swimming alone ____ be ____ dangerous. Do be careful.
There's no bus now, and we can't get home _______ by taxi.