There seems something wrong with my bikeI would like to get it________[ ]

study finds that sitting can shorten aperson’s life almost as much as smoking can, which _______ just how damaginginactivity can be.

Every few years, the coal workers ________ their lungs Xrayed to ensure their health.[ ]

Don’t sit on the chair. There ________ on it.

Why did he___ that the man we met on the bridge was his father? —God knows!