Some researchers believe that there is no doubt ________ a cure for AIDS will be found.(2005年广东省高考题)
—He _______ to the meeting. Have you informed him of it?—Sorry. I ________to.
It is not enough only________ the rules of grammar if you want to learn English well.
He________ the person referred to be put in prison.
______you I owe a thousand apologies ________ having doubted your ability.
______at in this way, the present situation about birds flue doesn’t seem so disappointing.