Where _______ for the past few years?

People often have this belief _______economicdevelopment is bad for the environment, but this does not have to be true.

I have kept the photoI can see it easily, as it reminds me of my happy childhood in the countryside. [ ]

I like mutton, ______ I like beef, too.

Not only his parents but also his brother____ to the Summer Palace. They haven’t been back.