1．If you swim in a river or lake, be sure to investigate ________ is below the water surface. Often there are rocks or branches hidden in the water.
答案：what
2．What we were interested in was ________ they managed to control the pollution here.
答案：how
3．We finally reached ________ the temple stands.
答案：where
4．The members of his family are proud of ________ he has achieved in the past three years.
答案：what
5．—I wonder ________ Mary has kept her figure after all these years.
—By working out every day.
答案：how
6．What the children want to do today is ________ they once did.
答案：what
7．Look at the high mountain. That is ________ we will get.
答案：where
8．Several modern buildings are being built in ________ used to be a market.
答案：what
