A few headmasters from New Zealand paid a visit to our school ________ May, 2003.

1. A.
   by the end of
2. B.
   at the end of
3. C.
   at the back of
4. D.
   in the end

A few headmasters from New Zealand paid a visit to our school ________ May, 2003.

A．by the end of

B．at the end of

C．at the back of

D．in the end