In the_____of proof , the police could not take action against the man .
| A．lack | B．shortage | C．absence | D．failure http:/ |
We are living in an age ______ we treasure very much, because it sees man’s rapid development.
| A．which | B．when | C．where | D．what |
These comments are not directly ______ to the inquiry about safety standards.
| A．controversial | B．accessible | C．appropriate | D．relevant |
______ to nuclear radiation, even for a short time, may influence genes in human bodies.
| A．Exposed | B．Being exposed | C．To expose | D．Having exposed |
We are short of clean safe drinking water, which is found to be the ______ in many third world countries.
| A．example | B．event | C．case | D．object |
Colonel Edward is not his real name, and it’s one he uses to ______ his identity.
| A．distinguish | B．disguise | C．classify | D．convince |