Will you please invite him _________ in a writing competition?
| A．joins | B．to joining | C．to join | D．joining |
To keep away from germs, we must not spit ______.
A. in danger B. in need C. in public
The river has become much ______ than before because of the waste water from the factories.
A. dirty B. dirtier C. dirtiest
In China, spring returns in March. The weather ______ warm and the days are longer.
A. gets B. sounds C. smells
A computer ______ think for itself. It’s always told to do things.
A. mustn’t B. can’t C. shouldn’t
Lily’s apartment is on the fifteenth ______ of the building and it has a good view.
A. room B. part C. floor