Even if the treatment ________, there is still no magic pill for patients in the late stages of AIDs.

The teacher called Tom to his officebecause he was caught in the exam.

Excuse me， is the zoo far from here—No， it’s about ______________.

What did the teacher say just now—Sorry, I didn’t catch it. I _________ something else.

_______ call me this afternoon! I’m not at home.