—If you don’t like the red coat， take the blue one.　　—OK， but do you have ______ size in blue？This one’s a bit tight for me.

Natural disasters occur at ________ times, so it is always difficult to warn people in advance.

The twins has studied in this school  ________    .

— You know Mr. Green has been ill for days?— Yes, I wonder if he is ______ better now.

Millions of youngsters across Europe could suffer ____ hearing loss after five years if they listen to MP3 players at too high a volume for more than five hours a week, EU scientists warned.