题目

It is necessary but difficult for English beginners to memorize new words, and long lists of words seem to make the task impossible. They are puzzled why they try to memorize words with great efforts but forget them easily. That's why there are often inquiries about how to memorize new words.  16  Here are some tips to help.     17  We too often separate the process of new words memorization from pronunciation. In fact these two can be combined and each will enhance the other. Saying the word to ourselves helps activate hearing memory, which helps the memory.  18   The more fam—How was your weekend?—Great! It was my grandfather's _______ birthday. We enjoyed ourselves.     [     ]A. seventy       B. seventieth    C. the seventieth     D. seventeenth