I didn't get in touch with David yesterday, since he( )a meeting when I called.
A.正确答案Bchaired
B.was chairing
C.had chaired
D.would chair
I didn't get in touch with David yesterday, since he( )a meeting when I called.
I didn't get in touch with David yesterday, since he( )a meeting when I called.
A.正确答案Bchaired
B.was chairing
C.had chaired
D.would chair