If he takes on this work, he will have no choice but____an even greater challenge.
He is rather difficult to make friends with, but his friendship, _____, is more true than any other.
On rainy days, accidents _____ happen sometimes on steep roads.
The interview he paid little attention to _____ him the chance to work in this company.
The doctors said it would be months _____ Yao Ming was fit enough for regular training.
_____ to give up smoking, he threw away his _____ cigarettes.