问题

Studies indicate that people are more _______ to suffer from back problems if they sit before computer screens for long hours.

A:possible
B:likely
C:sure
D:certain;

正确答案是：

同类题型

His behavior was weall refused to receive him in our homes

下列各句中，表达得体的一句是

Professor Haley told me that he__________by many of his students at the railway station

He is the tallest __________ the three.

The sign means “ _____.”