While __________ to help Tom with his math, I got impatient because he wouldn‟t pay attention5/64Choose the best answer: While __________ to help Tom with his math, I got impatient because he wouldn‟t pay attention to what I was saying.I am trying trying I try having triedGiải thíchĐáp án là B Rút gọn mệnh đề dạng chủ động: S+ V= Ving.