What the doctor really doubts is ___ my mother will recover from the serious disease soon.
Can you give me a reason to ___________ you absense yesterday?
A number of foreign guests were invited to the party, but 20 of them didn’t___________.
I think you should complain —______,of course, you are happy with the way things are.
-How do you usually find out about new software?-In the magazines like Popular Electronics. That’s______computer companies usually advertise.
______the address, Tom sent the email to his teacher.