【正文】
ons for the pictures. Think and work out the rules. Complete the following sentences. ? It’s very kind __________ (for/of) you to help me. ? It’s clever __________ (for/of) you to work out the Maths problem. ? It’s very dangerous __________ (for/of) children to cross the busy street. ? It’s difficult __________ (for/of) us to finish the work on time.