—How far can you run without stopping?
—________. I've never tried.
| A．Don't mention it | B．That's all right |
| C．I have no idea | D．Go ahead |
Things like electronics, glass or other ____ objectsare often packed with an appropriate protective material to prevent damage.
| A．flexible | B．concrete | C．abnormal | D．fragile |
Shortly after publication, the book became ____ because of the writer’s repeated use of the negative word "nigger" to refer to the black Americans.
| A．universal | B．conventional | C．controversial | D．skeptical |
Nearly 200 people entered the area ______ to mine diamonds in 2000, and eventually had to be driven off by the police.
| A．irregularly | B．illegally | C．imperfectly | D．unusually |
Hearing the fire alarm, she escaped____ from the office, leaving everything behind, including those important documents.
| A．in public | B．in panic | C．in relief | D．in particular |
Unlike the fossil fuels of today, biofuels are renewable sources, which mean that they will not____ easily.
| A．come out | B．break out | C．turn out | D．run out |