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
I'm really concerned ahout you. If something _______ happen to you call me at once.
#86661
A
would
B
should
C
could
D
might
The washing machine is of excellent quality. If there __________ be any problem within the first three years, we would fix it for free.
#87028
A
could
B
might
C
shall
D
should
This cake is very sweet．You __________ a lot of sugar in it．
#87614
A
should put
B
could have put
C
might put
D
must have put
If she that Mary would come to see her, she would never have gone to the party.
#87024
A
had known
B
knew
C
knows
D
would know
I forget where I saw the skirt, otherwise I _______ you the shop now.
#86736
A
will tell
B
would tell
C
am going to tell
D
am telling