Compendium of Materia Medica(本草纲目) tell us much about the history and medical _______ of many plants.
A.health B.price C.value D.cost
About ________ of the earth ________ covered with water, but we have less and less fresh water.
A.three-fourth; are B.three-fourths; is C.three-fourth; is D.three-fourths; are
In order to sell more products, we need to come up with more ________ ideas.
A.creative B.common C.simple D.cruel
—Which of the two subjects do you like, PE or music?
—________.They are really interesting.
A.Neither B.Both C.None D.All
—I offered Sandy a helping hand. However, she ________ it.
—Maybe she can manage herself.
A.received B.returned C.refused D.regretted
Trees are very important to our environment. They can _____ wind from blowing the earth away.
A.kept B.put
C.take D.stop
