题目内容

A children's librarian (often conducts) story hours and other activities(to help)children enjoy (herself) while developing an (interest) in reading and the library's resources.()

A. often conducts
B. to help
C. herself
D. interest

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Between 1871( until) 1891, (the population) of Toronto (more than) tripled, increasing (from )56,000 to 181,000.()

A. until
B. the population
C. more than
D. from

When (study) different cultures and societies, anthropologists often (focus on) marriage as (a) contractual agreement between (different parties).()

A. study
B. focus on
C. a
D. different parties

( Found )in the (shells of) lobsters, shrimp, and crabs, glucosamine (is also)_ present in human cartilage, which (covering )the bones in joints.()

A. Found
B. shells of
C. is also
D. covering

Lightning (tends to) strike the nearest (good conductor), and hence often strikes (in same) place more (than once).()

A. tends to
B. good conductor
C. in same
D. than once

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