We don’t doubt _______ we will complete all the projects before the year 2010.

A. when           B. if             C. that             D. whether

We don’t doubt _______ we will complete all the projects before the year 2010.

1. A.
   when
2. B.
   if
3. C.
   that
4. D.
   whether

We don’t doubt         we will complete all the projects before the year 2010.

A．when         B．if            C．that         D．whether

We don’t doubt _______ we will complete all the projects before the year 2010.