knocked at the door for nearly half anhour______Mary opened it, unwilling

We can never expect ________ bluer sky unless we create________ less polluted world.

On the way back home from the ball, she suddenly found her necklace____.

I have a pair of gloves. One is on the bed, but I can’t find _________.

Rather than _______on a crowded bus, he always prefers _______a bicycle.