Where are the girls—They thezoo.

comes of skilled workers went up. ______,unskilled workers saw their earnings fall.

They were abroad during the months when we were carrying out the investigation, or they _____ to our help.

To go to bed early and to get up early_________good_________one’shealth .

下列各句中，加线的词语使用恰当的一项是（     ）