By the time he realizes he into a trap, it’ll be too late for him to do anything about it.
| A．walks | B．walked | C．has walked | D．had walked |
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 |
— Do you like cooking, Serena?
— ______. Luckily, I’ve never had to worry about it. My husband will do the job.
| A．Never mind | B．Not really | C．All right | D．No way |