______ the temperature might drop, it’s wise of you to prepare some coal in advance.

(单选题)Months ago we sailed ten thousand miles across this open sea (单选题)Peter ______ a lot of Spanish by playing with native boys an (单选题)In the company ______ which I work, each of us is afraid of (单选题)小学英语课堂中常常采用唱英语歌曲的教学形式，其目的是______。 (单选题)The printer ______ out of order, the secretary did not know (单选题)His coach suggested that he ______ his right hand within six (单选题)At that time she could not ______ a new dress on her income. (单选题)The United States of America has a population of over ______ (单选题)Who was the first president of the USA? (单选题)—What do you think of Xi’an?—I think it’s becoming ______.