He often helps the students _______ he thinks are not quick at their studies. 
#69855
A
whom
B
who
C
when
D
because
推荐题目
_______in the ocean, it becomes powerless once it is on the beach. 
#69193
A
However a whale is powerful
B
However powerful a whale is
C
Whatever a powerful whale is
D
Whatever powerful a whale is
He took medicine 3 times a day,________ didn't work.
#67231
A
it
B
but
C
which
D
but which
.— I wonder if you _______ a picnic tomorrow.— Yes. But if it ______, we’ll visit the museum instead.
#41003
A
have; rains
B
will have; rains
C
have; will rain
D
will have; will rain