Mr. Black was old, but able to _______quickly to changes in technology.
| A．reply | B．apply | C．contribute | D．respond |
Paper money was in___________use in China when Marco Polo visited the country in __________thirteenth century.
| A．the … / | B．the … the | C．/ … the | D．/ … / |
Most animals have little connection with_______animals of________different kind unless they kill them for food.
| A．the … a | B．/ … a | C．the … the | D．/ … the |
The warmth of _____sweater will of course be determined by the sort of ____wool used.
| A．The ; the | B．the ; / | C．/; the | D．/; / |
I keep medicines on the top shelf, out of the children’s _______.
| A． reach | B． hand | C． hold | D． place |
The journey around the world took the old sailor nine moths, ______the sailing time was 226 days.
| A． of which | B． during which | C． from which | D． for which |