听力原文:W: Will Jim be able to come to the meeting? M: I don't know yet. When 1 phoned just now, his friend said he had taken his girlfriend out to the movies. Q: What can we learn from the conversation? (16)
【单选题】Sometimes, if the students lack too much vocabulary, the task which is designed will become frustrating and the students are likely to give up or revert back to the native language. It is known as( )...