Eugene’s never willing to alter any of his opinions, so it’s no use ________ with him.
As senior 3 students, it is the most important to _______ a good state of mind in face of failure.
_____ three influenza type A virus subtypes(子类型) have been found in pigs.
Who would you rather ______ you repair your CD player?
We decided to take a taxi.Luckily there was _____ waiting.
Ted has made up his mind to give it up, but on _____ second thoughts he determined to try______ third time.