---You could have walked here.---Yes. A taxi __________

---You could have walked here.---Yes. A taxi ___________ necessary.

#85964

was

isn’t

wasn’t

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E-mail, as well as telephones, _______an important part in our daily communication.

#85583

play

have played

are playing

is playing

Nobody but us _____ the secret.

#85806

know

knows

have known

is known

The population of city________ larger than that of any other city in the country.

#86183

are

has

have

Above one third of the population in Beijing and Shanghai      netizens, but in poorareas, only three or four percent        online.

#85897

is, is

are, are

is, are

are, is

There ______ many farm houses in our area.

#44273

are

was