dangerous

在繁忙的街道上骑自行车很危险。

Riding a bike on a busy street is ___dangerous.

在黑暗中游泳比在白天游泳更危险。

Swimming in the dark is ___more ___dangerous than swimming in the daytime.

医生说吸烟是你能做的最危险的事情之一。

The doctor says smoking is one of the ___most ___dangerous things you can do.

吃太多糖对你的健康有害。

Eating too much sugar is ___dangerous for your health.