Answer: 1. B被困住、被绊住(话说， 这个题目的subject very agreement是错的.答案句没什么但是问题句就....）2. B这个问题主要是在问‘你’是否有要type any letters. As according to the subject verb agreement, the answer should be B instead of others. C 是一定错的因为大部份的-ing 是会用在 is, are, was, were 等等後边的。D 也一定是错的；试著读一读就知道了。剩下的答案就是A 跟B 了。（其实，这个问题本身也是有错的。题目应该是: Do you have any letter...
