语法与词汇In 1865 the astronomer Maria Mitchell became ----appointed to the faculty of Vassar College.
语法与词汇"Do you need more water in the pan?"
"No,it has ___________".
语法与词汇(Until) 1985 the amount output (of automobiles) in the US exceeded (that the) rest of the (world combined).
语法与词汇By performing specific motions, forager honeybees are able to recruit ---------to gather at a recently discovered food source.
语法与词汇In the process of v...,rubber is combined with sulfur, make it ___ to heat and cold.
语法与词汇Duke Ellington''s orchestra,________ his own often complex compositions, made many innovations in jazz.
语法与词汇Pearl Sydenstricker Buck, _____ the Nobel Prize for Literature in 1938, is Best known for her novels about China.
语法与词汇(A queen) termite (lays) 440 million (of eggs)-an average of one per second (for) 14 years.
语法与词汇The ancient Egyptian water clock required sophisticated calibration, since water dripped faster from its bowl when ______ and the pressure was greater.
语法与词汇------ different kinds of beans are cultivated throughout the world.
语法与词汇------about 10 to 20 feet tall and are sparely covered with foliage.
语法与词汇Like bacteria, protozoans _______by splitting in two.
语法与词汇In (the early) nineteenth century, the Cherokee nation of American Indians (was adopted) a written constitution (based) on (that) of the United States.
语法与词汇It may be argued that genetics, the (study) of heredity and variation, (underwent) the (most rapid) development of any (science biological) in the twentieth century.
语法与词汇Larch and spruce trees ---- in bogs and wet areas of the northern United States.
语法与词汇During the nineteenth century the molecular theory of matter was developed, (which) considered (all matter) to (be composed) of tiny, indivisible (entity) called molecules.
语法与词汇Tornadoes, which are (frequent) seen (over) the Great Plains of the US in spring and early summer, (resemble) a dark funnel (extending) from cloud base to ground.
语法与词汇(Cameras) of one type or (another) have been (using) for more than (a) hundred years.
语法与词汇"After that,what happened to him?"
"The chance to enter_____ come and he took it."