---I feel the house shaking.----So do I .It ___ be sign of an earthquake most probably. Let’s hurry to leave here.
#90314
A
ought to
B
could
C
can
D
might
推荐题目
Nobody knows how people first came to these islands. They _____ from South America on rafts.
#87576
A
ust have sailed 
B
an sail 
C
ight have sailed
D
hould have sailed
. I supported him in time , otherwise he ______ off the bike .
#89506
A
might fall
B
would fall
C
should have fallen
D
would have fallen
I couldn't have got to the meeting on time - _______ an earlier train . 
#90401
A
if I had not caught
B
unless I had caught
C
if I did not catch
D
unless I caught