Tom wants to be another Obama after he graduates from school. —That sounds great, but how can he ____ a person like him if he goes on like this?[ ]

Tom looks nervous.— So youif you had so fierce a competition.

It’s going to rain. Xiao Feng, will you please help me ______the clothes on the line? [ ]

Since Shanghai won the right to host theWorld Expo, over half a million people have volunteered to ___________in allthe Shanghai Expo projects .

I looked at the pretty girl carefully, _____ who she could be. [ ]