a)1. Anna is writing a letter in her room.2. George is getting ready to go out.3. Carol and Dennis are having dinner. 4. Tom is making a phone call.b) 1. Anna was writing a letter in her room.Anna will be writing a letter in her room.2. George was getting ready to go out.George will be getting ready to go out.3. Carol and Dennis were having dinner.Carol and Dennis will be having dinner. 4. Tom was making a phone call.Tom will be making a phone call.