To be well-informed, we should be _____ communication each other what happens to us.
| A．on, for, about | B．in, for, for | C．with, by, at | D．in, with, about |
After so many hardships, the scientist his motherland at last.
| A．set on his foot | B．set foot on | C．set feet on | D．set his feet on |
Sarah pretended to be cheerful, nothing about the argument.
| A．says | B．said | C．to say | D．saying |
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 |