While every possible means __________ to prevent the river pollution, the river in my hometown has still not been restored to its past beauty.

While every possible means __________ to prevent the river pollution, the river in my hometown has still not been restored to its past beauty.

#100447

is tried

are tried

has been tried

have been tried

推荐题目

—_____ you _____ the sitting room? —Yes. It is 7 meters long and 4.5 meters wide.

#100937

Can; measure

Are; measuring

Would; measure

Have; measured

— Julia, what were you doing when Anna called you?—I       my housework and       to take a bath.

#101677

had finished; started

have finished; to start

have finished; have started

had finished; was starting

John _______ for London this afternoon and his flight _______ off at 18:20.

#101809

is about to leave; will take

is leaving; takes

is going to leave; is taking

is to leave; is about to take

I______toward the door to go outside when suddenly Jim opened it.

#99533

was walking

walked

hadwalked

walk

－What are you busy with ? －The conference _______ in our city next week.

#103391

held

will be held

be holding

to be held

共5993题