While         the book on the top shelf , you need to be very careful .
#85820
A
to reach
B
reaching
C
reach
D
are reaching
推荐题目
The Greens_____ in the room.
#43752
A
am
B
is
C
are
D
be
Every means _____ prevent the water from _____.
#85804
A
are used to; polluting
B
will be used to; polluting
C
is used to; polluted
D
is used to; being polluted
The watch and chain as well as the ring    of gold.
#85719
A
are made
B
were made
C
is made
D
was made