What’s wrong with you, Eric? You look tired.—I ________ to prepare for the final exam last night.

Please find more limericks _____ the Internet and learn them _____ heart. [ ]

The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent cause a series of explosions of the nuclear reactors in several power stations.

He is ＿＿＿＿ honest boy. He never tells a lie.

Thanks ______ your letter. [ ]