Samuel Clemens, _____ Mark Twain, because a famous American writer.
| A．was known as | B．known as | C．was known for | D．known for |
It is common knowledge that washing wool in hot water will make it________.
| A．change | B．shrink | C．slim | D．dissolve |
—Can you help me with this question, Tom?
—Sorry, it is beyond my________.
| A．power | B．strength | C．force | D．energy |
Air is________and of no smell but we can feel its motion when there is a wind.
| A．unavoidable | B．unavailable | C．unaccessible | D．invisible |
Mountain climbing must be very tiring, ________,you might feel sick with the air getting thinner.
| A．In addition | B．In turn | C．In return | D．In case |
Mark’s fluency in English gave him a big advantage________the other applicants for the job.
| A．against | B．over | C．than | D．beyond |