We work together to achieve our common purpose: ________ world that is safer, cleaner and healthier than ________ one we are living in.
| A．the ; / | B．a ; / |
| C．the ; the | D．a ; the |
HetookmyEnglish-Chinesedictionary_____mistake.
A、toB、byC、about
Wasacarinvented_____March4,1876?
A、onB、inC、at
Do you know where _________ some maps?
A、can I buy B、can buy C、I can buy
He doesn’t know _________.
A、to do what B、how to do C、what to do
He also _________ some signs asking for old bikes.
A、put down B、put up C、put off