On my way ____ home, I lost a ticket ____ Titanic.
When his mother came into his room, he pretended ______
Would you mind __ me how ___ the chemistry problem?
He is so careless that he often _______his school things at home.
--- Was Tom a member of Greener China?---Yes, he has ___ Greener China for 5 years.
The room was very dark, so I couldn’t see anything ______