Often he______ sit for hours doing nothing at all when he was in low spirits.

Often he______ sit for hours doing nothing at all when he was in low spirits.

A．should            B．would            C．could             D．might

23. Often he _________ sit for hours doing nothing at all when he was in low spirits.

Often he______ sit for hours doing nothing at all when he was in low spirits.

1. A.
   should
2. B.
   would
3. C.
   could
4. D.
   might