______ classes are there in your school–Fifty.

lly, students’ inner motivation with highexpectations from others ______ essential to their development

The earth and sand up the houses of the villagers. [ ]

If you cannot have a good command of grammar as wellas precise usage of each word you’ve learnt, it is ________ for you to useEnglish flexibly.

He has made up his mind to____________hisdream no matter what difficulties he may run into