单项选择题

In this passage, what does the term "coalescence" refer to

A．The gathering of small clouds to form larger clouds.
B．The growth of droplets.
C．The effect of gravity on precipitation.
D．The movement of dust particles in the sunlight.

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单项选择题

This passage is mainly about ______.

A．university life of foreign students
B．duties of the foreign student advisers
C．immigration matters of foreign students
D．the relationship between foreign students and their advisers

单项选择题

The passage indicates that the preschool movement ______.

A．was practiced even in ancient Greece and Rome
B．was not advanced until the 17th century
C．was first accepted in America in the 18th century
D．was denied by Froebel