The zoo keepers is worried because the number of visitors  __       smaller and smaller.

That tests can actually give measurement of the language skills of the students_______ by many teachers.

You are always making noises! Why must you be so annoying while the latest sports news ____ on the radio!

------Have you telephoned your father? ------- Yes. He ______back next year.

-- May I speak to your manager Mr. Williams at five o’clock tonight?--I’m sorry. Mr. Williams _______ to a conference long before then.”