The danger of HINI was real, especially in the beginning, little was known about the new disease.
A. if B. because C. when D. before
For those who don’t have to safe water, life is a constant struggle.
A. approach B. access C. way D. passage
All over the world the mobile phone has leaped from being an impossible luxury in the early 1980s to most people would now call a necessity.
A. which B. that C. what D. when
The Washington-Beijing relationship was now about more than trade. It also covered climate and other matters of international .
A. standard B. concern C. expectation D. chance
However, at times this balance in nature is disturbed, a number of possibly unforeseen effects.
A. lying in B. calling in C. resulting in D. taking in
Why don’t you bring to his attention that you are too busy to do it?
A. which B. it C. what D. that
