1)Boss is busy ... the moment. I'll let you know he is free.
a. in b. at
2)I'll stay ... home tonight.
a. in b. at
3)The car stopped ... the traffic light and we got out.
a. on b. at
4)I'm usually ... work at half past 8 a. m.
a. at b. in
5)We drove to the countryside ... our car.
a. by b. in
6)The car was parked ... the garden.
a. at b. in c. on
7)The children are playing ... the garden.
a. at b. in c. on
8) ... the morning.
a. at b.in c. on
9) ... Wednesday.
a. at b.in c. on
10) ... noon.
a. at b.in c. on

1) at

2) at

3) at

4) at

5) by

6) in

7)  сомневаюсь

8) in

9) on

10) at