---Have you heard of Earth Day? --- Yes, We have only one Earth. We have no choice but ________ it.
#49067
A
protect
B
protected
C
protecting
D
to protect
推荐题目
Do you prefer _______?
#49119
A
skate
B
skates
C
skating
D
skated
You should move back and forth while _______ basketball.
#50269
A
to play
B
playing
C
are playing
D
plays
When you read English,          translate every word into Chinese.
#50175
A
try not to
B
try to
C
don’t try
D
not try
–I feel tired and sleepy. –Why not stop __________?
#50602
A
to relax
B
breaking
C
resting
D
to work