--- Tom, where is your father?--- I’m not sure.He_______ in his office.
Mrs Smith lives in such a big house without a child around.So she feels very ___.
This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?
Nearly _______of the earth___covered by sea.
--Don’t worry. My mother will look after your baby __________. --Thanks a lot. A. careful enough B. enough careful C. carefully enough
The car accident happened ____ a cold winter morning. Luckily, no one was hurt.