单项选择题

When was sugar used widely

A．3,000 years ago.
B．In modem times.
C．Quite recently.
D．300 years ago.
<上一题 目录 下一题>
热门 试题

单项选择题
Why should we increase the production of sugar
A．It tastes sweet.
B．We can save plenty of land.
C．We can get more energy.
D．It is one of the most highly concentrated of energy foo
单项选择题
What was the author's purpose when writing this passage
A．To give practical instruction for pruning a tree.
B．To give a gardener description of pruning.
C．To explain how trees develop disease.
D．To discuss different methods of prunin
相关试题