We must try our best to the river being polluted any more.
| A．separate | B．keep | C．prevent | D．guard |
.
Many old Chinese people have the concept of ________ some money for their future use.
| A．picking up | B．setting aside | C．putting off | D．setting up |
.
Are the two glasses believed________by Tom?
| A．broken | B．to be broken | C．to break | D．to have been broken |
.
—Your school is really wonderful.
—Yes, it’s very modern. And every student has free ________ to the school library.
| A．access | B．chance | C．privilege | D．right |
.
It is generally considered unwise to give a child________ he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |
.
. People used to think that heavy objects always fell faster than light ________.
| A．ones | B．the ones | C．these | D．those |