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is to blame is to be blame are to blame are to be blamed
of; to for; to on; on in; on
a; 不填 the; 不填 a; the the; the
being accomplished accomplished to be accomplished having been accomplished
Are you all right? You can't be serious! I'm a foreigner. It doesn't matter.
at which when where at the place
Every of them Both they Nobody of them Not all of them
regularly generally approximately extremely
came the hour the hour came comes the hour the hour is coming
to learn, common. learning, ordinary to learn, ordinary learning, common