If we now to protect the environment, we’ll live to regret it.

If we         now to protect the environment, we’ll live to regret it.

#53390

hadn't acted

haven't acted

don't act

won't act

推荐题目

Peter, _________the door when you leave the room.

#52440

remember closing

remembers to close

remember to close

remembers closing

There _____ a pen, two pencils on the desk.

#52989

are

have

has

We should never ________till tomorrow what we can do today.

#59603

put on

put off

put up

put out

I think my dream can         !

#58928

come true

comes true

coming true

to come true

Daniel is one of those students who _______ always willing to help others .

#61678

are

was

were

共5907题