单项选择题

According to the passage, sugar was used in the study to ______.

A．feed the bees during the experiment
B．make the bees live in groups
C．reward the bees for good performance
D．train the bees to travel to a particular place

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单项选择题

What does the word raise (Line 3, Para. 3) mean

A．Bring up.
B．Collect.
C．Put on.
D．Lift.

单项选择题

How does the United Negro College Fund make students' dream become true

A．By giving them part-time jobs.
B．By opening an account for them.
C．By providing them with a sum of money.
D．By recommending a member college to them.