. I want to be very careful to talk only about ____ we've formally tested.
A. which B. that C. what D. whether
If we had taken the other road, we ________ earlier.
A. would arrive B. might arrive C. had arrived D. might have arrived
The driver _____, according to the newspaper, to have been killed in the traffic accident.
A. said B. was saying C. was said D. had been said
．— Have you ever visited the Opera House?
—Yes．When I was in Sydney, I ______ it twice．
A．have visited B．visited C．had visited D．would visit
Oh, much smoke here ! Somebody _____ the window, please.
A. opens B. open C. shall open D. will open
She looked up and nodded for me ______..
A. to come in B. coming in C. came in D. come in
