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The chairman thought________necessary to invite Professor Smith to speak at the meeting .

A．that B．it      C．this   D．him

The chairman thought _______ necessary to invite Professor Smith to speak at the meeting .

A．that  B．it  C．this  D．him

The chairman thought         necessary to invite Professor Smith to speak at the meeting .

       A．that                    B．it                        C．this                    D．him

The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.

The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.

The chairman thought______ necessary to invite Professor Smith to speak at the meeting.

A．that B．it       C．this           D．him

The chairman thought         necessary to invite Professor Smith to speak at the meeting .

A．that                 B．it                   C．this              D．him

99.The chairman thought___________necessary to invite Professor Smith to speak at the meeting .

A．that              B．it                C．this            D．Him

The chairman thought         necessary to invite Professor Smith to speak at the meeting .

A．that      B．it         C．this         D．him

99.The chairman thought___________necessary to invite Professor Smith to speak at the meeting .