A explain American's tolerance of current security checks. B stress the urgency to strengthen security worldwide. C highlight the necessity of upgrading major U.S.airports. D emphasize the importance of privacy protection.

A New restrictions on carry-on bags. B The declining efficiency of the TSA. C An increase in the number of travelers. D Frequent unexpected secret checks.

A quieter. B cheaper. C wider. D faster.

A a dramatic reduction of its scale. B its wrongly-directed implementation. C the government's reluctance to back it. D an unreasonable price for enrollment.

A Less Screening for More Safety B PreCheck- a Belated Solution C Getting Stuck in Security Lines D Underused PreCheck Lanes

A her conservative view on the historical role of astronomy. B the importance of astronomy in ancient Hawaiian society. C the regrettable decline of astronomy in ancient times. D her appreciation of star watchers' feats in her time.

A its geographical features. B its protective surroundings. C its religious implications. D its existing infrastructure.

A it may risk ruining their intellectual life. B it reminds them of a humiliating history. C their culture will lose a chance of revival. D they fear losing control of Mauna Kea.

A is fulfilling the dreams of ancient Hawaiians. B helps spread Hawaiian culture across the world. C may uncover the origin of Hawaiian culture. D will eventually soften Hawaiians' hostility.

A severe criticism. B passive acceptance. C slight hesitancy. D full approval.