We must do everything we can _________ our earth clearer and safer.
#49701
A
made
B
to making
C
make
D
to make
推荐题目
--- Our English teacher tells us to hand in our homework in time.--- Don’t forget your homework to school tomorrow.
#49723
A
to bring
B
bring
C
brings
D
bringing
On her way home, Lucy saw a thief ______ in a shop. She stopped ______ 110 at once.
#49517
A
steal; call
B
to steal; call
C
stealing; to call
D
stealing; calling
He devoted as much time as he could _________ on the plan.
#48907
A
working
B
to work
C
worked
D
to working