成年人应该知道如何帮助孩子们在智力上发展。

单项选择题The problem in the fourth paragraph refers to the fact that （）.

A．bandwidth isn’t big enough to send complex medical pictures
B．the second-generation of Internet has not become popular yet
C．communication satellites can only deal with short-term needs
D．there is not enough equipment for spreading the medical care

单项选择题第（4）空应选择（）

A．happily
B．far
C．nearby
D．alone

单项选择题Finally it gave (Paragraph 5)means that （）.

A．Luckily the door was torn away in the end
B．At last the wrench went broken
C．The 10ck came open after all his efforts
D．The chance was lost at the last minute

单项选择题It’s rat data but humans are mammals just like these animals are mammals. What does the sentence suggest（）

A．The experiments on the rats have nothing to do with humans.
B．The experiments on the rats are very important for animals,
C．The experiments on the rats are much the same on humans.
D．The experiments on the rats are much the same on other animals.

单项选择题第（3）空应选择（）

A．parties
B．holidays
C．visits
D．driving