The atomic weight of oxygen is_____than ______of the hydrogen.
| A．15 times heavier; that |
| B．15 times heavier: those |
| C．16 times as heavier; that |
| D．16 times as heavy; those |
Last weekend, Tom and Linda went shopping outside and went on spending until their money was_________.
| A．at the end | B．at an end | C．by the end | D．in the end |
I don’t like the way ______ you speak to your mother.
| A．which | B．in that | C．by which | D．/ |
_______ is known to everybody, the moon travels around the earth once a month. .
| A．It | B．As | C．That | D．What |
My father and his teacher talked a lot about the things and persons ___ they could remember.
| A．who | B．which | C．what | D．that |
About ________ of the workers in that steel factory_______ young people.
| A．third-fifths ; are | B．three-fifths ; are | C．three-fives ; is | D．three-fifth ; is |