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     our earth, or else it will be no longer fit for us to live on.
#65875
A
Protected
B
To protect
C
Protecting
D
Protect
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____________ make so much noise. The students are taking an exam.
#59433
A
Isn't
B
Doesn’t
C
Don’t
D
Haven’t
If the green light isn’t on, ________ a minute.
#59469
A
waiting
B
to wait
C
waited
D
wait
— ______, please.                 — K-E-Y.
#59408
A
What’s this
B
Spell it
C
Can you spell it
D
What is it
______ at the door before entering please.
#66016
A
Knocked
B
Knock
C
Knocking
D
To knock
Let’s   football in the street.
#66229
A
not to play
B
not play
C
don’t play
D
not playing