Mr. Smith works with a mobile phone company, but he _____________ for this international meeting, since he is on holiday.
His father often helps him _____ his lessons. [ ]
Do you plan your homework at home?—Yes, of course.
Who got the first prize in the English competition yesterday?-A boy __________ spoken English is very good.[ ]
When did he work_______the railroad? —From 1904 to 1909.[ ]
