【题目】I’m sorry. All the flights_______because of bad weather now.

【题目】---What did the man say over there? ---He told us_____any further. There is danger.

【题目】---I’m sorry to have kept you ______so long. ---Oh, never mind.

【题目】We ______them that there was a dangerous dog in the field.

【题目】---Are there aliens on other planets? ---Maybe. But no one knows ________.

【题目】There is_____ that learning English well is very important for teenagers.

【题目】Students have many problems._______, they often feel worried before an exam.

【题目】----I have a terrible fever. ----I advise you ________ the doctor right now.

【题目】It has been proved ______ he is a smart boy.

【题目】Daming __________ to take part in my birthday party last night.