The pictures are not labeled with corresponding sentences in the provided image. However, based on the visual content and typical matching exercises, a hypothetical matching could be:
Picture a might relate to people watching an event.
Picture b shows people in striped uniforms, possibly a sports team or performers.
Picture c depicts someone looking at a screen, possibly watching TV.
Picture d shows a hand plugging something into an electrical socket.
To provide a definitive answer, the actual sentences that correspond to pictures a, b, c, and d would be needed.