单词填空 根据所给汉语或首字母写出空缺处单词的适当形式，使句子完整，语法正确，每空一词（共10个小题；每小题0.5分，满分5分）
He ________(预测) that prices would drop and that was the case.
No one knows the _______(潜在的) side effects of the new drug, so it needs to be tested further.
The doctor suggested he have a physical examination at regular _______(间隔).
When the president ________(对……说话) the nation, he often chooses his words carefully.
They are trying to get a _______(专利) for a new kind of car.
Sarah r________ her brother’s offer of help. She decided to do it all by herself.
The film comedy, Mr. Popper’s Penguins, is an a_______ of popular children’s book.
When waiting to see the dentist in the waiting room, I had a c_______ conversation with a stranger beside me.
He is always p_______ for the appointments. He doesn’t like being late.
He undertook to turn up, but u_______ he got caught in the traffic jam.