Tom __ study as hard ad Jane

I showed several old friends of mine around the city,_________ surprise，the changes had been so great.

I wonder why you failed so many of the questions. Only the first question was difficult, but the rest, I thought, ______ very easy.

How many people came to Brazil for the World Cup in 2014—It is hard to say. ______ people, I think.

She ________ her clothes down on the ground.