1．A．Flora is the oldest of the three．

B．Kate is younger than Flora．

C．Dave is the youngest of the three．

D．Kate is younger than Flora but older than Dave．

2．A．Don’t climb these rocks without a guide．

B．Be careful of these sharp rocks．

C．Mind you don’t fall off these rocks．

D．Stay away because the rocks are unsafe．

3．A．I am pleased to receive any advice．

B．You should ask if you want me to help you．

C．You are advised to wait here for me．

D．Please help yourself if I am busy．