Storing our clients’files electronically will result in a more______

单选题 Storing our clients’files electronically will result in a more__________use of our office space·

A．Efficiencies
B．efficiently
C．efficiency
D．efficient

参考答案D

解析: 句意为“把客户资料保存为电子文件会更加高效地使用我们的办公空间。”空格后面是名词．因此需要填入形容词，只有D项符合，efficient意为“有效率的，高效的”。

单选题 December sales。were__________low，and sales staff are encouraged to submit suggestions on how to address the problem．

A．Disappointing
B．disappoint
C．disappointed
D．disappointingly

单选题 Ms．Chen thought that her idea for a new washing machine could be a profitable__________．

A．Invents
B．invent
C．inventor
D．invention

单选题 ’rhe audience，hostile at first，were greatly__________by her excellent performance．

A．Annoyed
B．encouraged
C．impressed
D．depressed