501. study hard,up and up .好学向上。

502. up and down.上窜下跳

503. it’s raining cats and dogs.暴雨倾盆。

504. as poor as a church mouse.一贫如洗。

505. as difference as day and night.黑白分明（天壤之别）。

506. it’s unbelievable.难以置信。

507. nothing to offer.无可奉告。

508. as strong as an ox.体壮如牛。

509. dream comes true.梦想成真。

510. too many cooks spoil the broth人浮于事。

511. eat like a bird.细嚼慢咽。

512. eat like a pig.狼吞虎咽。

513. drink like a fish..嗜酒如命。

514. improve the occasion.因势利导。

515. out a figure.崭露头角。

516. anything is good with me(it’s up to you.).悉听尊便

517. be looking forward to doing 热望良久。

518. wait for me a while (a moment).稍等片刻。

519. take care of yourself.好自为之。

520. good trip.一路顺风

521. know mistake and put right.知错必改