1．today we have chat rooms, text messaging, emailing…but we seem ________the art of communicating face to face.
a．losing b．to be losing
c．to be lost d．having lost
2. principal white has been working in the school for about 20 years，________all his energy to teaching and researching as well as the running of a healthy school.
a．devoted b．devoting
c．to devote d．and devote
3．________not to drive after drinking, some drivers are still trying their luck, which is really dangerous.
a．being reminded b．to remind
c．having reminded d．reminded
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