How _____you say that you really understand the whole story if you have covered only part of the article? [ ]

1The computer is broken. ＿＿＿ it＿＿＿today?

Do you use QQ to chat—Yes.I often talk the NBA games my friends.

The latest edition of Harry Porter has been abest-seller for 3 weeks_______.

She was scared the yard because she was scared by the big dog at the gate.