--- Did you go for the Shanghai Expo? ---- I _____ to, but I decided to stay with my sick mother at the last minute.
What he said sounds ___.
--What’s ___ at the theatre this evening ?---It's ____ Comrade Leifeng.
When he was ten, Edison ___ a small lab of his own.
The trains___ the travellers who want to go to other places.
The four years, from 1860 to 1864 ___ Lincoln spent fighting for freedom of the slaves is the time ___ the American people will never forget.