26. When first _______ to the market, these products enjoyed great success.
|
A.
introducing |
|
B.
introduce |
|
|
C.
introduced |
|
D.
being introduced |
25. Don’t leave the water ______ while you brush your teeth.
|
A.
run |
B.
running |
C.
being run |
D.
to run |
24. The flu is believed _______ by viruses that like to reproduce in the cells inside the human nose and throat.
|
A.
causing |
B.
being caused |
C.
to be caused |
D.
to have caused |
23. Have you ever asked him the reason ______ may explain his absence?
|
A.
why |
B.
when |
C.
that |
D.
what |
22. ______ is well known to all, too much stress can cause disease.
|
A.
Which |
B.
It |
C.
That |
D.
As |
第一节 语法和词汇知识(共15小题；每小题1分，满分15分)
21. I think ___ good knowledge of English is ___ great help when you are traveling around the world.
|
A.
x; a |
B.
a; a |
C.
a; the |
D.
a; x |