Page 1
a. Were they working hard?
b. Jim has not eaten yet.
c. You read a lot.
d. Tom is writing a letter.
e. Tina left yesterday.
f. We have met before.
g. Sam was watching TV.
Page 2
a. Why are you crying?
b. How did you get here?
c. What does Jack usually does on Saturdays?
d. How long have you lived here?
e. Where was David going?
f. Who are you talking to?
g. What were you doing?