13. Unfortunately, we cannot send you a full range of samples at present, but you may rest _____ that the products are of the same high quality.
A、assure
B、assured
C、ensure
D、ensured

单项选择题In Pirandello's short story War, which of the following characters remained mentally strong from the beginning to the end? A、The couple's son. B、The husband in the couple. C、The fat traveller they meet on the train. D、The wife in the couple.

单项选择题In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).A、Write the bibliography for the woman. B、Give her his own paper. C、Find some relevant papers for her. D、Look up the books in the library for her.