______ 200 bones forming the framework, or skeleton, of the human body.A．Being overB．There

The title of the passage could be______.A．Introduction to Flying BlueB．Flying with Air Fra

______, particularly the oxides of sulfur, greatly increases the rate at which rust forms.

With age, the mineral content of human bones decreases, ______them more fragile.A．makeB．an

The new housing form. discussed in the passage refers to ________.A．single－family homesB．a

The camera adjusts the shutter speed _________, so it is really a good choice forme,

Come and sit by the fire; you look ______ to the bone.A) cooledB) chokedC) chilledD) c