Toàn thể những người cùng chung sống trong một khu vực lãnh thổ hoặc đơn vị hành chính, gắn bó thành một khối, giữa họ có sự liên kết và hợp tác với nhau để cùng thực hiện lợi ích của mình và lợi ích chung là A: quy trình hợp tác. B: hoạt động du canh. C: tình trạng di cư. D: cộng đồng dân cư.

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BÀI TẬP TRẮC NGHIỆM CHUYÊN ĐỀ 2: CÁC THÌ THƯỜNG GẶP( PHẦN 1) THÌ HIỆN TẠI ĐƠN, HIỆN TẠI TIẾP DIỄN, QUÁ KHỨ ĐƠN, hay QUÁ KHỨ TIẾP DIỄN? 1.My mother _______ the newspaper now. A. read B.reads C.reading D. is reading 2. Those children _______ for 2 hours every afternoon. A. sleep B. sleeps C. is sleeping D. are sleeping 3.We always _______ our English lessons carefully. A. do B. does C. is doing D. are doing 4. At present, he _______ for a foreign company. A. work B. works C. is working D. are working 5.The earth _______ around the sun once every 365 days. A. go B. goes C. is going D. are going 6.Where _______ now ? I _______ to the theatre. A. do you go/go B. are you going/ go C. are you going/ are going D. are you going/ am going 7. The students _______ all of the new words very well now. A. know B. knows C. is knowing D. are knowing 8. Just a minute! I _______ that word in the dictionary. A.look B. looks C. looking D. am looking 9. We _______ the use of verbs in English at the moment. A. study B. studies C. is studying D. are studying 10.The teacher _______ at the board when he _______ to explain something. A. point/ want B. points/wants C.points/ is wanting D. is pointing/ is wanting 11. It _______ when I got up this morning. A. rains B. rained C. is raining D. was raining 12. Albert Einstein _______ in 1955. A. dies B. is dying C. died D. was dying 13. They _______ in the library when the fire alarm went off. A. study B. are studying C. studied D. were studying 14. What _______ when you arrived there? A. does she do B. she did C.was she doing D. were she doing 15. He _______ economics at Harvard for almost 50 years. A. teach B. taught C.was teaching D. were teaching 16. Helen _______ in the lobby, wasn’t she? A. works B. worked C. was working D. wrere working 17.Mr. Thanh _______ to the office twice yesterday. A. goes B. went C. was working D. were working 18. The wind _______ very hard when I went out this morning. A. blows B. is blowing C. was blowinng D. were blowing 19. He fell while he _______ down the stairs. A. goes B. is going C. was going D. were going 20. What _______ when you saw him ? He _______ a kite. A.does Ba do/ is flying B. did Ba do/ was flying C. was Ba doing/ flew D. was Ba doing/ was flying