21£®The        on his face told me that he was satisfied with the experiment result.

A. impression  B. expression   C. sight        D. appearance

22£®Professor li keeps telling her students that the future      to the well-educated.

A. belongs    B. is belonged   C. is belonging  D. will be belonged

23. This is the first time we         a film in Washington as a family.

A. see        B. had seen     C. saw         D. have seen