This book is very _____ and I am ______ in it.

Usually E-mail is_________ than long-distance calling．

---Could we see each other at nine o'clock tomorrow morning? ---Sorry, let's make it ______________ time.

--- Are you pleased with her work, sir?--- Not at all, It couldn’t be any _____.

 —Do you think twenty people are enough for the work?—No. I am afraid we need at least______ students.