I can’t help you ____ much for your help．

 We may find that learning a foreign language does not have to be________learning our mother tongue，but can in fact be twice ________.

  She devoted herself ________to her research and it earned her a good reputation in her field.

— I think it’s beneficial to build a library near our dormitory building.—  　　　. It will be a great convenience.

There are forty five students in our class, and they are _____ interested in football.