词性转换、

401. Now we have realized the ________ of population control.(important)
402. The boy worked out the maths problem without any ________ (difficult)
403. His brother became a professional _______ at last. (football)
404. In, fact, he felt even ________. (bad)
405. Because of his ________, he cannot go to school today. (sick)
406. Paper causes fire _________. (easy)
407. These _______ (busy) letters are written in English.
408. __________, I missed the last train yesterday. (lucky)
409. Tom did not do his homework as _________ as before, (care), so he made a lot of mistakes.
410. We will try our ______ (well) to pass the exam.
411. Don’t talk ______(loud) in the library.
412. My father told me lots of his exciting _______ in Japan. (experience)
413. They have ______ in doing this job. ( difficult)
414. Water is very useful to _______ (life) things.
415. The first plane flew only 120 _______ (foot)
416. It is _______ (near) eight.
417. He will pay a ________ (friend) visit to us tomorrow.
418. The shoes are in all _______ (size) in our shops.
419. The ________ in our ________often help each other.(neighbour)
420. The ______ season will come. But I don’t like _______ all the time. (rain)
421. I was very _______ with the ________ trip. (please)
422. The black was much _______ (ill) without any medicine.
423. Please your _______ (dirt) hands.
424. The _______long and hard, but he didn’t stop _________. (run)
425. They put on many clothes so that to keep them ______ (warm) in cold weather.
426. He kept _______ (wait) for me yesterday.
427. ________ (sing) is a laguage.
做得好加分！

401. Now we have realized the __importance______ of population control.(important)
402. The boy worked out the maths problem without any __difficulties______ (difficult)
403. His brother became a professional __footballer_____ at last. (football)
404. In, fact, he felt even ___worse_____. (bad)
405. Because of his __sickness______, he cannot go to school today. (sick)
406. Paper causes fire __easily_______. (easy)
407. These ___business____ (busy) letters are written in English.
408. ___Luckily_______, I missed the last train yesterday. (lucky)
409. Tom did not do his homework as __careless_______ as before, (care), so he made a lot of mistakes.
410. We will try our __best____ (well) to pass the exam.
411. Don’t talk __loudly____(loud) in the library.
412. My father told me lots of his exciting ___experience____ in Japan. (experience)
413. They have _difficulties _____ in doing this job. ( difficult)
414. Water is very useful to _living______ (life) things.
415. The first plane flew only 120 ___feet____ (foot)
416. It is __nearly_____ (near) eight.
417. He will pay a __friendly______ (friend) visit to us tomorrow.
418. The shoes are in all __sizes_____ (size) in our shops.
419. The ___neighbours_____ in our _neighbour_______often help each other.(neighbour)
420. The ___rainy___ season will come. But I don’t like __raining_____ all the time. (rain)
421. I was very __pleased _____ with the __pleasant______ trip. (please)
422. The black was much ___worse____ (ill) without any medicine.
423. Please your ___dirty____ (dirt) hands.
424. The ___running ____long and hard, but he didn’t stop ___running______. (run)
425. They put on many clothes so that to keep them _warmer_____ (warm) in cold weather.
426. He kept __waiting_____ (wait) for me yesterday.
427. ___Singing _____ (sing) is a laguage.

1,importance. 2.difficulty 3. footballer 4.worse 5.sickness 6.easily 7.busniess 8.Unluckily. 9.carefully 10.best 11.loudly 12.experiences 13.difficulties 14. living 15.feet 16. nearly .17friendly 18.sizes 19.neighbours ,neighbourhood 20,raining ,raining 21,pleased,pleasant ,22 worse 23.dirty 24.run,running 25,warm 26.waiting .27.singing

robberies。robbery本来就是名词啊，抢劫案的意思，rob是动词，robber是抢劫者