— I’m afraid I can’t finish the book this week.
— ____.
| A．Please go ahead | B．That’s right |
| C．Not at all | D．Take your time |
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 |
In China, as we all know, brides are often dressed in red as it is a________of good fortune.
| A．slogan | B．brand | C．logo | D．symbol |
________number of people who own luxury cars is on ________increase every year.
| A．A; the | B．A; an | C．The; the | D．The; an |