In the last six to nine months，teens in the US to text messaging in numbers twice that in Europe and Asia．
| A．took | B．have taken | C．had taken | D．would take |
—Did you find out the time of the train to Miami?
—Yes, the early train is _______ to leave at 5:30 a.m.
| A．likely | B．due | C．possible | D．about |
The trade union intended to call on the workers to go on strike _______ the government’s limitation on exports.
| A．in response to | B．in demand of |
| C．in honor of | D．in favor of |
Traditionally, college students hold a graduation ceremony to encourage themselves before they _______ on their life journey.
| A．give up | B．set off |
| C．get through | D．settle down |
Our school requires that all students _______ on the campus.
| A．must wear school uniforms | B．wearing school uniforms |
| C．to wear school uniforms | D．wear school uniforms |
At the routine office meeting, the headmaster insisted that the problems _______ paid special attention to.
| A．referred to being | B．referred to be |
| C．refer to being | D．refer to be |