填空题 {{B}}SECTION 4 Questions 31-40{{/B}}

{{B}}Questions 31-36{{/B}}
Complete the following statements using {{B}}NO MORE THAN THREE WORDS{{/B}} for each gap.

填空题 Arboreal nests often feature carton ______ constructed by termites.

填空题 Subterranean nests are common where there are ______ of moisture all year.

填空题 The centre of a subterranean nest features a ______.

填空题 The ______ surrounding a subterranean nest is thick, rock hard and waterproof.

填空题 ______ is one gas that is poisonous to termites.

填空题 Using hot, dry air from outside to ______ a subterranean colony would dehydrate it.