单项选择题

The years after 1812 were relatively unproductive because ______.

A．he felt good in his romantic relationships
B．he realized that his hearing was compromised
C．he felt inadequate to create more musical pieces
D．he was very low in spirits

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热门试题

单项选择题

What could scientists do if Robert's theory proves to be true

A．They could drive the insects away.
B．They could keep the plants well-watered.
C．They could make the plants grow faster.
D．They could build devices to trap insects.

单项选择题

What do plants do when they are thirsty

A．They give out faint cries.
B．They make noises to drive away insects.
C．They extend their water pipes.
D．They become elastic like rubber bands.