1. The police ________ the lost child and tried to find his parents.
A. took up B. took in C. took over D. took after
2. ----I have got a headache.
---- No wonder. You ________ in front of that computer too long.
A. work B. are working C. worked D. have been working
3. Charles Babbage is generally considered to _______ the first computer.
A. to invent B. inventing C. to have invented D. having invented
