He said he would arrive before seven, and______ ．
A．he did B．did he C．he had D．had he
A big dust storm covered Sydney for hours, ______ the Sydney Opera House invisible．
A．made B．making
C．make D．to make
---Hi, Terry, can I use your computer for a while this afternoon?
---Sorry．______．
A．It’s repaired B．It has been repaired
C．It’s being repaired D．It had been repaired
---How can I apply for an online course?
---Just fill out this form and we______ what we can do for you．
A．see B．are seeing C．have seen D．will see
---Where were you when I called at your house this morning?
---Oh, I_____ for a friend from Tokyo at the airport．
A．had waited B．am waiting C．have waited D．was waiting
Plastic bags are provided for our convenience but they have also_______ the pollution of the environment．
A．adapted to B．turned to C．contributed to D．looked forwarded to
