________，I will help you with your work.
| A．If I am possible | B．If it possible |
| C．If possible | D．Possible |
So lost in their computers____that leaders at summer computer camps often have to force them to break for sports and games.
| A．became the children | B．become the children |
| C．had the children become | D．do the children become |
The police need some more evidence ________they can make a conclusion.
| A．since | B．before | C．after | D．until |
With the development of science, more new technology ______to the field of IT.
| A．has introduced | B．is being introduced | C．is introduced | D．was introduced |
The high-speed rail _________Xiamen with Longyan is to open on June 30th.
| A．linking | B．links | C．linked | D．to link |
Don’t believe in those ads that you can master a language in one month. Instead, it is a(n) _______process, which may last for years.
| A．rapid | B．instant | C．gradual | D．regular |