21.Sea turtle eggs__________to protect from__________by other animals A.are buried/ being eaten B.buried/ to be eaten C.are burying/ eating D.be buried/ eaten 22.The cutting down of trees__________to prevent forest destruction A.should control B.should be controlled C.would control D.controlling 23.The first turtles__________about 200 million years ago A.believed to exist B.are believing to be existed C.believed to be existed D.are believed to have existed 24.We cannot do this A.This cannot do B.This cannot do by us C.This cannot be done D.This cannot to be done 25.They do not know anything about the extinction of that species A.Anything about the extinction of that species is not known by them B.The extinction of that species is not known anything C.Nothing is known about the extinction of that species D.Nothing about the extinction of that species is not known 26.John wrote this novel, didn’t he? A.This novel was written by John, didn’t he C.Did this novel be written by John, didn’t he? B.This novel was written by john, wasn’t it? D.Did this novel be written by john, didn’t it? 27.The reclainming of land__________to conserve the environment A.should carried out B.should carry out C.should be carried out D.should have been carried out 28.The vase of roses was put__________ A.on the table by Mary yesterday morning B.on the table yesterday morning by Mary C.By Mary on the table yesterday morning D.yesterday morning on the table by Mary 29.computers__________since 1940s A.is in used B.was used to C.used D.have been in use 30.Our work__________before the boss__________next week A.will have completed/ returns B.will have been completed/returns C.will have completed/ is returned D.will have been completed/ will be returned 31.When did they first discover that island? A.When did that island first discovered? C.When that island was first discovered? B.When was that island first discovered? D.When was first discovered that island? 32.Our plan__________by the members of the committee A.considers B.considered C.is considering D.is being considered 33.Unfortunately, the patient__________to hospital too late A.sent B.has sent C.had sent D.was sent 34.no one has told me about the project before A.The project has not told to me before B.The project has been not told to me before C.I have not told about the project before D.I have not been told about the project before 35.not much__________about the accident since that time A.has said B.it is said C.had said D.has been said 36.Lectures__________on the Internet A.are recorded and posted B.are recorded and post C.are recording and posted D.are recording and be posted 37.The money__________soon after I receive my salary A.will give Peter B.will be given Peter C.will be given to Peter D.will have given to Peter 38.The project__________secret. Everybody__________about it soon A.could not been kept B.could not be kept/ learnt C.could not be keep/ was learnt D.could not kept/ is learned 39.Everybody congratulated him on his successful journey to explore the Everest A.His sussessful journey to explore the Everest was congratulated on him B.His sussessful journey was congratulated on him to explore the Everest C.he was congratulated on his sussessful journey to explore the Everest D.He was congratulated by anybody on his sussessful journey to explore the Everest 40.some scientists report that dolphins have a brain capacity larger than human beings’ A.A brain capacity larger than human beings’ that dolphins have to be reported B.Dolphins are reported having a brain capacity larger than human beings’ C.Dolphins are reported to have a brain capacity larger than human beings’ D.Dolphins are reported that they have a brain capacity larger than human beings’