I. needn't; must; needn't; should; had to; will have to
II. 1) hardly; 2) near; 3) wrongly; 4) highly; 5) hard; 6) late; 7) right; 8) nearly; 9) most; 10) lately; 11) wide
III. 1) it is; 2) are, them; 3) are, them; 4) it is; 5) are; 6) they are; 7) is; 8) it is