________ of people were at the airport to ________.

[　　]

A．Thousand; see off them

B．Thousands; see off them

C．Thousand; see them off

D．Thousands; see them off

  Each of us has to write a ______ report every three weeks.

   A. two-thousand-words                         B. two-thousand-word

   C. two-thousands-word                                 D. two-thousands-words

 We have planted thousands of trees in recent years. This year _____ we’ve planted ten thousand trees.

     A. even          B. just          C. alone          D. only

We have planted thousands of trees in recent years. This year _____ we’ve planted ten thousand trees.

     A. even          B. just          C. alone          D. only

We have planted thousands of trees in recent years：This year______ we have planted ten thousand trees．

A．just              B．even             C．alone             D．only