填空题 I ______ (had stayed/stayed) in Beijing for three years by then.

填空题 He had tried everything but it made little ______ (difference/different).

填空题 Had you asked ______ (I/me) yesterday, I could have lent you the money.

填空题 We should make ______ (it/this) a rule to leave things where we can find them easily.

填空题 The environment organization announced there could be a lot of ______ (true/truth) in the research.

填空题 ______ (Translation/Translate) is always difficult for me.

填空题 They should blame ______ (ourselves/themselves) for the accident.

填空题 It's a twenty ______ (minutes/minutes’) walk.