单项选择题

Out of 300 papers checked for fakes,（）

A．255 were originals
B．45 were originals
C．85% were fakes
D．155 were originals

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单项选择题

If teachers want to find out if their students wrote their own papers, （）

A．they ask other teachers to read their students' papers
B．they ask their students to list their sources of information
C．they can sign up for the Internet service
D．they search the Internet and compare papers

单项选择题

Job skills are （） you need for a specific job.

A．lessons
B．abilities
C．working
D．recognizes