A.Why energy is important
B.The energy sources used in the past
C.Comparing future energy solutions
D.Discussing how disasters affect power sources

A.Taking a selfie with pets is considered the most dangerous.
B.Pictures of near misses are popular on social media.
C.Action has been taken to warn selfie-takers against dangerous situations.
D.There was an increase in the number of selfie-related deaths in 2015.

A.the photo
B.the head
C.a baseball
D.a stadium

A.dealing with
B.becoming greater than
C.competing with
D.becoming better than

A.upset other people
B.share them with others
C.have lovely memories with friends
D.show off their beautiful lives

A.Posing with Animals
B.Dying for a Selfie
C.A Ban on Selfie-taking
D.Positive Trends in Photography

A.Posing with Animals
B.Dying for a Selfie
C.A Ban on Selfie-taking
D.Positive Trends in Photography

A.unchanged
B.unjustified
C.unnoticed
D.unattended

A.abundant
B.limited
C.insufficient
D.replaceable

A.It creates lots of pollution.
B.It costs more money than other solutions.
C.No one is interested in using it.
D.It won’t work at all in many nations.