I smell something ________ in the kitchen.Can I call you back in a minute?
---It’s getting dark, but Mr. Johnson is still at his office. ---No surprise. Who else can ______ he does?
Since David ______ downloaded a virus into his computer, he can not open the file now.
---How often do you eat out? ---______, but usually once a week.
--Have the police found the parents of the baby found by the road? ---Not yet. His identity ______.
---Mr. Smith, ______ he have all these letters typed for you right away?---He ______. They should be ready by 10 o’clock this morning.