别总是抱怨你的作业，赶紧完成它。

Stop ___grizzling about your homework and just get it done.

那位头发花白的老爷爷坐在公园长椅上晒太阳。

The ___grizzled old man sat on the park bench, enjoying the sunshine.

当我们靠近时，那只熊发出低沉的咆哮声。

The bear ___growled as we approached it.