We should play a part in ______ the earth.
#46449
A
Save
B
to save
C
saving
D
saved
推荐题目
The       walked       the road     .
#47165
A
disabled; across; carefully
B
deaf; cross; careful
C
Greens; through; carelessly
D
blind; across; careless
 — ______ do you study for tests? —I study_____listening to tapes.
#47104
A
How; with
B
What; with
C
How; by
D
What; by