—Look! The lights in the teachers’ office are still on. Is Mr. Li working?—No. It _______ be Mr. Li. I saw him leave just now.
-- ____ is the population of your city? -- About seven ____.
Usually, we like to _________ before doing sports so that we can't hurt during the sports.
Here’s my telephone number. Please _________
– Could you give me _____ on how to learn English well? -- Sure.
What ______ enjoyable idea it is!