下列语句中，没有语病的一项是( )

Mum, would you please buy me a MP5 player—If you can help do the dishes the whole vacation，you have one as a reward

is known to us all isthe old scientist, for whom life was hard in the past, still works very hard in his eighties.

With drink and food ____, the farmer had to walk out of the cave.

下列各句中，没有语病的一句是（ ）