21) The theme that reflects the idea that there has been a gradual change in thetime is _____.(A)ene
22) Some birds are known as honey guides because they may be followed by humans to wild beehives. Wh
23) Referring to the figure belowenergy _____.(A)increases(B)decreases(C)decreases then increases(D)
24) The nucleus of an atom contains _____.(A)protons and neutrons(B)neutrons and electrons(C)protons
25) What are the basic building blocks of proteins?(A)nucleic acids(B)peptide bonds(C)amino acids(D)
27) Each of the following is a main idea of the cell theory(A)all organisms are composed of cells(B)
28) Which of the following equations best represents photosynthesis?(A)C + O2 + H2O→ CO2 + HOH (C)6C
30) Scientists agree that two developments must have occurred for life to come into being: the forma
31) Natural selection can best be defined as the _____.(A)survival of the biggest and strongest orga
32) What is the primary function of plant leaves?(A)to support the plant (C)to take in water(B)to pr
34) The hormone that causes a decrease in blood glucose is _____.(A)glucagon (C)gastrin(B)insulin (D
2. There is a great _____ of opinions with regard to the construction of a nuclear power plant.(A) d
3. The delicate and _____ sculpture in the National Palace Museum has soon become the most popular t
4. To overcome budget shortages, some small schools in rural areas have set up _____ programs to sha
5. Those _____ wires can be very dangerous, so you should at least wrap them with some tapes to keep
6. The children were so noisy that they caused their grandfather to become _______ and nervous.(A) e
7. It’s a good news for our research team since the government plans to _______ the research and dev
8. A person who has the trait of _______ is always careful and putting a lot of effort into his work
9. Copyrights, customer lists and company goodwill are the so-called _______ business assets.(A) ame