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
Tom sounds very much in the job, but I’m not sure whether he can manage it．
A．interested B．interesting C．interestingly D．interestedly
