.—I’ll ask the teacher about theattributive clause. I’m very puzzled about it —That’s just ____ most of our classmateshave doubt.

urn to the problem of water pollution , I’d like you to look at a study _______ in Australia in 2012.

I like the dress, but I’m _____ I haven’t got enough money.— Don’t worry. I don’t mind ______ you some if you like.

Liang Bo，the champion of the Voice of Chinais a man offewwords but has remarkable inner strength

When I got on the bus，I ________ I had left my wallet at home.(2011·山东)