Type the passive form of the verb in parentheses, then press "Check". If you need help, you can click on the "Hint" button to get a free letter. Neg. means negative.
Your e-mail _____ (can/access) from any computer with an Internet connection.
The direction of an electron’s spin _____ (can/control) magnetically.
Scientists said that smaller populations of monarch butterflies _____ (could/find) in the western United States.
Within five years, sensor computers _____ (could/shrink) to the size of a grain of sand.
Some experts say that current techniques for matching fingerprints _____ (may/flaw).
Pluto _____ (may/make) of many of the same materials as the primordial solar system.
Microsoft _____ (might/require) to add products made by rivals to Windows.
Dr. Seshadri said people with pernicious anemia _____ (might/harm) if they took folic acid without also taking vitamin B12.
More _____ (must/do) to control the introduction of new forms of genetically modified seeds and plants.
The blood tests _____ (must/perform) at a laboratory approved by the insurance company.
For maximum efficiency, the coils on the back of your refrigerator _____ (should/clean) at least twice a year.
Some scientists believe that cloning experiments _____ (should/permit neg.)to continue.