With several students , Mr. Smith came into the lab.
| A．follow | B．followed | C．following | D．to follow |
When and where to build the new factory _____ yet.
| A．have not decided | B．are not decided |
| C．has not decided | D．is not decided |
I have many friends, ________ some are businessmen.
| A．of whom | B．from which | C．who of | D．of them |
. Only in a few countries in the world _______ a reasonable standard of living.
| A．enjoyed people have | B．people have enjoyed |
| C．people can enjoy | D．can people enjoy |
. They came together with the same ______ about the earth’s environment and the same dream of co-existing peacefully.
| A．attention | B．concern | C．tradition | D．business |
Most of the young men looking for adventure in the rainforest had difficulty ___ to the terribly hot weather.
| A．adopting | B．sticking | C．adjusting | D．devoting |