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—Have you known Dr. Jackson for a long time?

—Yes, since she________ the Chinese Society.

A. has joined          B. joins                         C. had joined                 D. joined

Have you known Dr. Jackson for a long time?

 —Yes, since she________ the Chinese Society.

A. has joined       B. joins                C. had joined           D. joined

—Have you known Dr. Jackson for a long time?

—Yes, since she        the Chinese Society.

A. has joined                B. joins                 C. had joined                D. joined

—Have you known Dr. Jackson for a long time?

—Yes, since she________ the Chinese Society.

A. has joined          B. joins                         C. had joined                 D. joined

—Have you known Dr. Jackson for a long time?

   —Yes, since she________ the Chinese Society.

    A. has joined       B. joins                C. had joined           D. joined

—Have you known Dr. Jackson for a long time?

—Yes, since she _________ the Chinese Society.

A. has joined  B. joins

C. had joined  D. joined

―Have you known Dr. Jackson for a long time?

―Yes, since she________ the Chinese Society.

A.has joined            B.joins                    C.had joined                D.joined

―Have you known Dr. Jackson for a long time?

―Yes, since she________ the Chinese Society.

    A. has joined          B. joins                         C. had joined                 D. joined

 —Have you known Dr. Jackson for a long time?

   —Yes, since she              the Chinese Society.

   A. has joined             B. joins             C. had joined       D. joined

 —Have you known Dr. Jackson for a long time?

—Yes, since she________ the Chinese Society.

A. has joined          B. joins                         C. had joined                 D. joined