Elbert Einstein, for ______ life had once been very hard, was successful later in science .
| A．whom | B．whose | C．which | D．his |
After two hours ,they were tired _____picking cotton and had a ______.
A.of ;stop B.with ;break C.for ;rest D at; pause
They had all the children well looked after ______their parents relieved (放心)
| A．making | B．being made | C．to make | D．made |
In no country _____Britain,it has been said ,can one experience four seasons in the course of a single day .
| A．rather than | B．other than | C．except for | D．more than |
Don’t worry .The food _______us three days .
| A．lasted | B．will last | C．remains | D．will keep |
To succeed in doing an experiment,________.
| A．carefulness is needed | B．carefulness is one needs |
| C．one needs to be careful | D．one need be careful |