Mrs Smith lives in such a big house without a child around.So she feels very ___．
| A．lonely | B．alone | C．rich | D．nervous |
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?
| A．a | B．an | C．the | D．/ |
Nearly _______of the earth___covered by sea.
| A．three fourth; is | B．three fourths; is |
| C．three fourth; are | D．three fourths; are |
--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.
| A．in | B．on | C．at | D．of |