单选题"It carries white blood cells and disease-fighting chemicals called antibodies to places where foreign invaders such as bacteria and viruses are causing infections" this statement______.
单选题Since Xerox couldn't work smoothly, he assumed that someone had ______ with it.
单选题Computer ______ is a complex consisting of two or more connected computing units, it is used for the purpose of data communication and resource sharing. A．storage B．device C．network D．processor
单选题
单选题Samuel: What a surprise! You have changed your car. Diana: Yes, and another surprise. I'm going to get engaged with Jessic
单选题An area of rich forests was ______ to life. A. advantageous B. decorative C. attracted D. privileged
单选题Of all the soldiers they had the ______ of being the fiercest, the most patriotic, the toughest.
单选题Physical activity through sports can enhance your child’s physical health.Sports can also have a positive effect on his mental health.Sports participation helps children ____21____life skills such as
单选题The council had already ______ a portion of the rates for the inner ring road scheme.
单选题We ____ that diet is related to most types of cancer but we don't have definite proof.
单选题The purpose of the so-called 'human rights' concept, which is guaranteed and reinforced by government, is based upon the belief that ______.
单选题Don't _____ the camera _______ unless you are sure you can put it together.
单选题The detective and his assistant have begun to _____ the mysterious murder.
单选题Mr. Green said his clients ______ our samples by the end of last month.
单选题Would you please bring me some ______ catalogues? These are too old.
单选题A: We should write letters to our friends who live outside the country. B: ______.
单选题Customer: ______ Clerk: Here you are. 20 dollars.
A. Give me 20 dollars worth of stamps, please.
B. I want to purchase 20 dollars of stamps, please.
C. Five 2-dollar and ten 1-dollar stamps, please.
D. Could I have some stamps, please?
单选题阅读下列短文，然后根据短文的内容从每小题的四个选择项中选出最佳的一项。B Maria Mitchell（1818-1889）,the first woman asdivonomer（天文学家）in the United was born in Nantucket, Massachusetts.Her parents valued education and insisted on giving
单选题"Will you be able to finish the job this week?" " ______."
A. I can't say it
B. I don't know that
C. I'm not sure this
D. I don't expect so
单选题I made this myself but it was ______ who taught me.