20. （ ）

(单选题)— Did Li Lei call me while I was out?— Yes, it was_____ that (单选题)You ______ smoke while you’re walking around in the wood. Yo (单选题)______, his idea was accepted by all the people at the meeti (单选题)We ______ while Mr. Even read the exam results. (单选题)I make $2,000 a week. $60 surely won’t make ______ differenc (单选题)______ time went by, Herbert could finish all the math exerc (单选题)We Chinese have a dream —______ dream to turn a well-off lif (单选题)— May I look at the menu for a little while？— Of course, ___ (单选题)It worried her a bit ______ her hair was turning grey. (单选题)Most people work because it’s unavoidable. ______, there are