lump

矿工在隧道里发现了一块煤。

The miner found a ___lump of coal in the tunnel.

我在壁炉里发现了一小块煤。

I found a small ___lump of coal in the fireplace.

他在人行道上发现了一块沉重的混凝土。

He discovered a heavy ___lump of concrete on the pavement.