Mr. Smith didn’t go to the party because he had a lot of experiments _____.
The attackers were arrested and didn’t know where they ______.
___________a time in the 1960s when young people liked wearing army uniforms.
We tried hard,and eventually,we were able to get Mike______us his car just for a day.
—Why are your hands so dirty? —I________in the garden.
—Why not open the windows to let_____cool air in? —I'd rather you didn't_____air in our town is terribly polluted. A.a;The B/;The C./;/ D.the:/