单项选择题


Questions 23 to 25 are based on the conversation you have just heard.

A．Planktons are too small to be seen.
B．Most planktons have transparent tissues.
C．Most planktons are practically invisible to predators.
D．Planktons are fascinating organisms.
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单项选择题
A．European immigrants flooded into the city.B．More and more rushed there for gold.C．It became a resting place for US soldiers.D．The Darling Harbor redevelopment project boosted the expansion.
A．European immigrants flooded into the city.
B．More and more rushed there for gold.
C．It became a resting place for US soldiers.
D．The Darling Harbor redevelopment project boosted the expansion.
单项选择题
A．Many guests didn’t give a performance at the party.B．Many guests didn’t show their faces. They are masks.C．The party wasn’t held, because many guests didn’t come.D．The party was held last night, but many guests didn’t come.
A．Many guests didn’t give a performance at the party.
B．Many guests didn’t show their faces. They are masks.
C．The party wasn’t held, because many guests didn’t come.
D．The party was held last night, but many guests didn’t come.
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