1 . He explained that his diet was so strict that he had to reward himself ________. (根据句意填空)

2 . Tomorrow there will be _______ sunshine with cloudy intervals so he has made a plan for a picnic with his family.

A．mainly

B．occasionally

C．roughly

D．extremely

3 . With more and more farmers moving to cities, an inadequate labor force is ________ becoming a major factor affecting the country's grain output.

A．automatically	B．occasionally
C．absolutely	D．gradually