Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
#33567
A
while
B
or
C
for
D
so
推荐题目
_______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
#79673
A
Even if
B
As far as
C
If only
D
So long as
The police said they would not give up looking into other possibilities ____they find out what happened.
#32173
A
as
B
while
C
until
D
although
Help others whenever you can ______ you will make the world a nicer place to live in.
#79975
A
and
B
or
C
unless
D
but
At the evening party the host said ________ was able to solve the riddle could get a nice present as a reward.
#31762
A
whoever
B
who
C
no matter who
D
whomever
---- ________ you like the cell pone so much, why not buy it?---- Well, I don’t have enough money.
#31341
A
In case
B
Now that
C
Even though
D
Only if