With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.A. a; / B. the; a C. a; the D the; /
With inspiration from other food cultures,American food culture can take a________for the better.
Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
Poetry written from the________of the urban youth tends to reveal their anxiety over a lack of sense of belonging.
Meals in Spain are quite different from ________ they have in China.
________ seems to be a strong competition in China for senior high students to enter universities does exist in other countries as well.