The water changes into thick ice covering rivers and lakes in winter in Harbin. —— ＿＿＿＿ in Urumqi and children go skating on it then.

Christmas, people get together andsing Christmas songs for _________.

Do you know _______ now –Outside the school gate.

elieve it or not, two ____ is worthan egg.

下列各句中，没有语病的一项是（ ）