(2013·成都第二次诊断)—Where did you get this book?—I picked it up from a secondhand bookshop if you ________ know.
#11319
A
must
B
will
C
can
D
shall
推荐题目
________ have an internal clock that controls the beating of our heart, and the ________ of our breathing.
#11165
A
Human being; steps
B
Humans; pace
C
Human beings; steps
D
Man; pace
On our journey to Australia last summer, our luggage was _____ at the customs. We were not allowed to carry food such as meat and vegetables.
#13188
A
looked through
B
gone through
C
seen through
D
got through
--- Lucy seems in low spirits.--- Yes, all her efforts were ____ and no one was interested in her invention.
#13682
A
in need
B
in vain
C
in place
D
in use
The hotline_________ be very busy，but keep trying and you’ll get through．
#11656
A
should
B
must
C
can
D
would
The moon is the earth
#14522
A
as big as forty-nine times.
B
forty-nine times bigger than
C
as big as onethird
D
one-third the size of