Thomas Malthus was an Anglican clergyman.A．YB．NC．NG

Lisa Perez was always optimistic during the period of her unemployment.A．YB．NC．NG

Gossips are always with an evil intention, and the stories are always untrue.A．YB．NC．NG

It was early farmers who developed calendars.A．YB．NC．NG

The Greenwich Mean Time was set up in 1884.A．YB．NC．NG

The young man was very proficient at operating computer.A．YB．NC．NG

The economic effect of Gulf War was of significance to later wars.A．YB．NC．NG