The pair of glasses over there ________ cool. Bring ________ to me and let me have a look.

many extra planes and trains are usedto carry passengers, traffic tools are still ______needed during “May Day”holidays.

It _____ long before we _____ the result of the experiments. [ ]

Kids are not allowed to leave kindergartens their parents come to pick them up

If you find somebody is murdered, what will you do first——