单选题 The fund provides money to clean up chemically ___________ industrial sites.

单选题 Travelers on a ______ might prefer to camp.

单选题 There is a growing tendency among employers to _________ casual staff.

单选题 He went to the party ______ as a dinosaur.

单选题 A good ___________ is to harvest the crop early in September.

单选题 We can visit the ______ palace and learn about Chinese culture there.

单选题 He ___________ the new information age.

单选题 It took them about one month to ______ how to start the equipment.