请判断下列句子中划线部分单词的词性A. 形容词 B. 副词 C. 介词 D. 连词I can’t sleep the night before an exam. I’m really anxious, because I can’t find my backpack.Amy is a most unusual woman.
—Will she come to your birthday party? —________.
These boys had problems________to the top of that mountain.
Three fifths of the students in our school________boys.
Singapore is a good place________a holiday.
There are________people who want to travel to China.