The farmer had to wear heavy boots in the winter because the fields were too wet and________.

Night ________ (fall), we hurried home.

龚自珍诗 "昨日相逢刘礼部，高言大居快无加。从此烧尽虫鱼书，甘作东京卖饼家。 "反映了他的学术转向 ()

The engine has broken and the boat is ______ on the water.

则下列结论正确的是（）