But for friction (摩擦力), people ______ neither walk, nor even stand up.
#86752
A
can
B
were able to
C
will be able to
D
could
推荐题目
The children _________ for the accident. After all, they were so young.
#87808
A
should not be to blame
B
not to be blamed
C
were not to blame
D
were to not blame
Why ____ you keep troubling your mother with such question while he is busy .
#89771
A
can
B
will
C
would
D
must
But for the help of my English teacher, I _______ the first prize in the English Writing Competition.
#87749
A
would not win
B
could not win
C
could have won
D
would not have won
-___________you sing so loudly so late? Can`t you see it is already midnight? -Oh,sorry.
#87261
A
Can
B
Should
C
Must
D
Would