2. 1) Tony has been talking on the phone for two hours.
2) I have been looking for my keys since 11 a.m.
3) We have been waiting for the bus for 20 minutes.
4) She has been playing computer games for 50 minutes.
5) They have been living in Moscow since January.
3. 1) We all should try to make up with friends soon after silly tiffs
2) I cannot make out this rule.
3) Do you easily make up stories?
4. 1) power station
2) trash bin
3) endangered species
4) acid rain