| This was to make sure any potential event could be timed to the nearest thousandth of a second. |
| He glanced around for a moment to make sure no one was around, then about-faced and began walking away. |
| Before the key goes into the ignition, before the gear goes into drive, make sure you weigh all the risks. |
| If your furnace or heating system uses filters, make sure you clean or check them monthly. |
| Once you've established that the car runs acceptably, try all electric functions to make sure they haven't been affected by damp. |
| We can compete with sides above us, we've just got to make sure we get our game right. |
