Don’t be taken in by products        to help you lose weight in a week.

 The money he has contributed in the past years to ______ the disabled is now considered to be of great value.

______ with new scientific farming methods, they have been able to use less farmland thanin the past.

A sheep_______on this kind of special grass usually grows much faster than_______on ordinary (普通的).

“ ______ as often as you can,” our English teacher often tells us, “ you will make rapid progress.”