Every afternoon a group of old women pass down the road outside my house._______ a load of firewood.

With nothing ________ to burn, the fire became weak and finally died out before the firefighters came.

With so many orphans ________，the charity organization calls for more donations.

--- Why do you look so upset?--- ________, I had to take over his work.

The country has already sent up three unmanned spacecraft, the most recent__at the end of last March.