. I want to be very careful to talk only about ____ we've formally tested.
| A．which | B．that | C．what | D．whether |
It was what he meant rather than what he said _________ annoyed me.
| A．which | B．as | C．what | D．that |
“How was _________ they discovered the entrance to the underground palace?” “Totally by chance.”
| A．it that | B．he that | C．it when | D．he which |
It was lack of money, not of effort, _________ defeated their plan.
| A．which | B．as | C．that | D．what |
It’s more than half a century _________ my grandfather joined the Party and became a servant to the people.
| A．when | B．that | C．since | D．while |
“Was it under the tree _________ you were away talking to a friend?” “Sure. But when I got back there, the bike was gone.
| A．that | B．where | C．which | D．while |