In Twain, many people know what a “motorpool” means．It is   1  known as a place for the maintenance of official business and government cars． 2  it is a place for vehicle maintenance.

       More than ten years ago I came to America on business and I took advantage of the  3  to visit my friend．My friend drove a car to  4  me at the airport, and took me to his home．Out of the  5 , my friend drove his car into the innermost  6  , which had a sign “carpool only”．I   7  what “carpool” meant．I felt doubted whether he was going to a motorpool． 8  I thought myself clever in asking:

       “Is there anything wrong with the car?”

       “Nothing． 9  ?”said he.

       “Well then, why are you going to carpool?” I  10  .

       My friend couldn’t help  11  and told me that “carpool” refers to the lane that only the cars with two or more   12  can drive in．I felt rather   13 on hearing that.

       After dinner, my friend’s neighbour came over to ask whether he  14   “carpool” the next day．“  15  ，”my friend said “I will accompany my friend to go shopping tomorrow.” I was   16  again, wondering why he could not “carpool” with him since we had “carpooled” today．My friend explained to me again that the “carpool” that his neighbour  17  meant they in turn drove the car to work so as to save  18  ．The first “carpool” is a noun,   19  the second “carpool” is a verb．It is really  20  for newcomers in America to understand it in a short time.

1．A．commonly             B．probably              C．partly                  D．simply

2．A．In general              B．In particular         C．After all               D．Above all

3．A．break                    B．time                    C．chance                D．place

4．A．watch                   B．help                    C．meet                   D．catch

5．A．sight                     B．airport                 C．kindness              D．plane

6．A．line                       B．lane                     C．range                  D．route

7．A．wondered              B．knew                  C．understood          D．learned

8．A．For                       B．Thus                   C．Then                   D．Though

9．A．How                     B．What                   C．Why                   D．Where

10．A．reminded             B．responded            C．explained             D．judged

11．A．thinking               B．talking                 C．laughing              D．showing

12．A．passengers          B．drivers                C．kids                    D．ladies

13．A．surprised             B．excited                C．annoyed              D．embarrassed

14．A．needed                B．could                  C．should                 D．would

15．A．Sure                   B．Sorry                  C．Pardon                D．Good

16．A．upset                  B．doubtful              C．confused             D．worried

17．A．used                   B．insisted                C．learned                D．provided

18． A．energy               B．time                    C．money                D．gas

19．A．as                       B．so                       C．while                  D．for

20．A．interesting       B．difficult         C．important        D．necessary