Could I have a(n) ______ word with you, Mr. Thomas? It won’t take up too much of your time.

—I watch I Am a Singer every Friday night.—Me too. I have never seen a ________ entertainment program.

Don't keep your mouth ___ if you want to improve your spoken English.

(2014·辽宁大连高三双基测试)My________subject is Business Administration and my minor subject is English.

Your sentence is ________ if you haven’t left out “an”. Next time pay more attention.