Question

---This is useful machine which was made in _...

---This is useful machine which was made in ________thirteenth century A．a, the B．an , the C．/, the D．the , /

Answer 1

A

试题分析：句意: -这是一台有用的机器，它是在13世纪制造的。本题考查冠词，第一空的a 是来修饰machine的，是一个可数名词的单数形式，故用a ；第二空是说13世纪，前应用定冠词the 。故选A。