Read the time from the clock, and for each clock, determine the current time and then the time one hour later.

The hour hand is pointing directly at 3.
The minute hand is pointing directly at 12.
This indicates the time is 3 o'clock.

Time = $\boxed{\text{3:00}}$

The hour hand is between 2 and 3, closer to 3.
The minute hand is pointing at 9, which represents 45 minutes.
The current time is 2:45.

$2:45 + 1 \text{ hour} = 3:45$
Time after one hour: $\boxed{\text{3:45}}$

2)

The hour hand is pointing directly at 10.
The minute hand is pointing directly at 12.
The current time is 10:00.

$10:00 + 1 \text{ hour} = 11:00$
Time after one hour: $\boxed{\text{11:00}}$

3)

The hour hand is between 1 and 2, closer to 2.
The minute hand is pointing at 10, which represents 50 minutes.
The current time is 1:50.

$1:50 + 1 \text{ hour} = 2:50$
Time after one hour: $\boxed{\text{2:50}}$

4)

The hour hand is between 7 and 8, closer to 8.
The minute hand is pointing at 9, which represents 45 minutes.
The current time is 7:45.

$7:45 + 1 \text{ hour} = 8:45$
Time after one hour: $\boxed{\text{8:45}}$