赞题库-背景图
单项选择题

______ in the company for three years, Mark has become experienced in business negotiations.

A．Having worked
B．Have been worked
C．Have worked
D．Worked
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热门试题

单项选择题A．describeB．generalizeC．categorizeD．change

A．describe
B．generalize
C．categorize
D．change

单项选择题A．showingB．havingC．expressingD．presenting

A．showing
B．having
C．expressing
D．presenting