• A. to discover sentence patterns and grammatical rules
• B. to expand vocabulary
• C. to use the target language
• D. to encourage unsuccessful language learners to learn independently, actively and purposefully
• E. from clues
• F. to say strange things

The author wrote this text ______.

A．Although
B．If
C．Unless
D．Until

A．There are more and more cable companies to compete in the internet cooperation market.
B．The amount of data they kave to move is rising while their accomadation is not increased so quickly.
C．The videos files damage the pipes that are used to transporting the information.
D．Telecom and cable companies have too much content to provide that they need to enlarge there pipes.