Give the correct tense of the verb in brackets:
1. The baby (cry)               because he is hungry now
2. It (rain)           now. It (rain)                      for four hours
3. I (stay)                      until you (come)                           tomorrow
4. This is the best wine I (drink)                   
5. Shakespeare (write)                     a lot of plays
6. I (not wear)                  that skirt since Mary's birthday
7. It started to rain while you (sleep)
8. John (do)                            his homework already
9. He (read)            53 pages so far
10. They (not speak)                to each other since they quarreled
11. Please don't say anything while I (learn)              my lesson
12. Up to now, I (do)                 every exercise in this book
13. Mrs Green (take)                  Alice to the dentist's many times
14. Don't make much noise! Our mother (sleep)                
15. I (read)               that book 3 or 4 times before
16.  I (not get)                 up until 8 o'clock yesterday morning
17. You (not be)             here for ages
18. What                       you (do)                      at this time yesterday?