You will ________ better if you eat ________ ice cream.

How much are these pants? –_______ twenty dollars．．

Could you please tell Lucy that I want to talk to her? —Sure, I will tell her as soon as she _______ back.

Will you come to the dinner party?—I won’t come unless Jenny ___________。

To live a low-carbon life , we must try to save _____ energy and produce ____ carbon .