It’s dangerous______a tree.
#58020
A
climbing,
B
going up
C
to climb
D
clim
推荐题目
_____Peter____ Bill is good at sports. They both play basketball really well. 
#55390
A
Either; or
B
Not only; but also
C
Both; and
D
Neither; nor
 People won’t  see any flowers ____ May.
#58452
A
before
B
after
C
until
D
since
_______ Peter is old and weak, he still has to work.
#58030
A
But
B
Even though
C
So
D
Because of