24. For a seagoing, cargo-carrying sailing vessels, the clipper ship was remarkablyfast.
vessels -------------> vessel
36. The nectar of flowers are ingested by worker bees and converted to honey in special sacs in their digestive systems.
答案是B,是因为NECTAR是单数不能用ARE?
B is correct. are ingested ----------> is ngested 'the nectar' is singular
37. Lucid dreaming, the ability dreamers to become aware of and to control their dreams whiledreaming, is the focus of some current psychological research. 答案是A,可是D用SOME后边的RESEARCH怎么是单数?
'some' can mean 'one'. the ability dreamers ---------> the dreamers' ability or the ability of dreamers