A model or an experiment in a science class can help students see things which would ______ remain hidden.
.She is the only one of those women archaeologists who ________ chosen to go to Loulan.
.. His words puzzled me so much that I had a hard time trying to ____ what he really meant.
.The President said to the public, “________ hoped that people in the area will recover from the terrible earth quake soon.”
.It was _______ was advertised on TV that made many customers buy the computer which was not so perfect as the ad said.
. Great changes have taken place in that school. It is no longer ___ it was 20 years ago, ___ it was so poorly equipped.