If we work with a strong will, we can overcome any difficulty, _____great it is.
| A．what | B．how | C．however | D．whatever |
When he was ten, Edison ___ a small lab of his own.
| A．set up | B．set off | C．set out | D．set in |
The trains___ the travellers who want to go to other places.
| A．used to carry | B．get used to carrry | C．are used to carry | D．are used to carrying |
The four years, from 1860 to 1864 ___ Lincoln spent fighting for freedom of the slaves is the time ___ the American people will never forget.
| A．when; when | B．which ; that | C．when; which | D．which; when |
The place ___ I often visit is a place ___ salves used to be sold.
| A．which ; where | B．where ; where | C．which; which | D．where; which |
He broke __ the Freedom Party and joined the Worker’s Party.
| A．away | B．from | C．out from | D．away from |