The rice is cold (O) (to warm)

I'm tired of watching TV. (O) (turn off)

I can't do this myself. (R)

It's dark in here. (R) (switch on)

There isn't any coffee left. (O) (make more)

There's no signature on this cheque. (R) (sign)

The windows are dirty. (R) (clean)

This suitcase is heavy. (O) carry)

Why is the garden gate open? (R) (close)

I don't know how to use this computer. (O) (teach)