— How long is it ______ you picked up your badminton training?— It was not until my finance became better in last December ______ I started the training.
It is generally accepted that ________ boy must learn to stand up and fight like ________ man.(2011·全国)
We can never expect ________ bluer sky unless we create ________ less polluted world.(2009·安徽)
Experts think that ________ recently discovered painting may be ________ Picasso.
Take your time—it's just ________ short distance from here to ________ restaurant.
Carl is studying ________ food science at college and hopes to open up ________ meat processing factory of his own one day.