Some scientists think that it will take __ of years to make robots do most work for humans.

      A. hundreds               B. hundred                C. thousand

Some scientists think that it will take __ of years to make robots do most work for humans

1. A.
   hundreds
2. B.
   hundred
3. C.
   thousand

Don't worry. The nurse will take ________ of him.

1. A.
   after
2. B.
   care
3. C.
   place
4. D.
   seat