单项选择题

The mad moments in the first paragraph refers to the time when we ______.

A．have some mental problems
B．have lost our important things
C．don't listen to what our friends tell us to do
D．fail to remember what should be remembered

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热门试题

单项选择题

The negative effect of engineering solution is that ______

A．it costs a large amount of money which is not affordable
B．the government worries about the quality of the water conservancy
C．it destroys the habitat of plants and animals of that area
D．the government becomes more and more ignorant

单项选择题

According to the passage, ____.

A．the game plan for keeping brain cells sparking doesn't work for everyone
B．Dr. Small's memory tests can show you what to do about brain aging
C．Dr. Small's advice can help us fight brain aging effectively
D．our brains can reconstruct memories themselves