Nowadays _____ mails are used more and more frequently. [ ]

It is well known to us all ____ China sent up a manned spaceship to outer spaceSuccessfully last year.

30s were the year when he wrote one_____ after another, and when his firstcollection of _____ was published.

Her uncle ___ to New York now, he ___ there twice.He’ll be back tomorrow.

ggestion, ____ by the locals, proved to be avery constructive one.