1Let＇s do the cleaning right after class, ( )?

7. "My uncle comes in from Iran tonight."“How long has it been ( ) you last saw him?"

6. "Did you return Fred＇s call?"“I don＇t need to ( ) I＇ll see him tomorrow."

5. ( ) to New York, her father has not heard from her.

4. ( ) he worked all day, he couldn＇t finish the job.

3. I＇ll leave him a note ( ) he＇ll know where we are.

2. We must begin testing the instrument, no matter ( ) difficult it is.

1. If anybody ( ) me while I＇m out, tell him I＇ll call him back later on.

17. ( ) is known to the world, Mark Twain was a great American writer.

16. The letter ( ) I mailed to my sister a month before Christmas has not yet reached her.

15. I＇ve never dined with you, sir; and I see no reason ( ).