Would you please speak ____ a loud voice? I didn’t catch what you said, with all the noise going on.
This is one of the best films _______.
Some researchers believe that there is no doubt ________ a cure for AIDS will be found.
Mum is coming. What present _______ for your birthday?
Danny left word with my secretary _______ he would call again in the afternoon.
Elephants have their own way to tell the shape of an object and _______ it is rough or smooth.