51.The central provinces have floods in some years, and __________.

252.Which of the following is a stative verb(静态动词)?

251.If you explained the situation to your lawyer, he ________ able to advise you much better than I can.

250.All the Presidents Men _________ one of the important books for scholars who study the Watergate Scandal.

249.There is no doubt ________ the committee has made the right decision on the housing project.

248.It is not so much the language _______ the cultural background that makes the film difficult to understand.

247.Which of the italicized parts expresses a future tense?

246.Which of the following statements is INCORRECT?

245.Mary is ______ hardworking than her sister, but she failed in the exam.

244.When you have finished with that book, don’t forget to put it back on the shelf, ______ ?

243.When the sentence “Shall I drive you to the airport first?” is turned into indirect speech, which of the following is most appropriate?