Public _________ of the problem will make the government take it seriously.
| A．existence | B．evidence | C．awareness | D．solution |
Some forms of algae have to growing on ice.
| A．adopt | B．adapt | C．advocate | D．addict |
Antarctica holds 90% of the world’s ice, and most of its fresh water (70%) is in a frozen .
| A．state | B．condition | C．situation | D．solution |
She has a lot of things, so she knows exactly how to deal with such a person.
| A．gone through | B．gone on | C．gone by | D．gone into |
Parts of the cave have been badly affected by rain andto the air.
| A．express | B．excavate | C．exposure | D．expand |
By the time Jack returned home from England, his son from college.
| A．graduated | B．has graduated | C．had been | D．had graduated |