Decide which of the choices given below would best
complete the passage if inserted in the corresponding blanks. Mark the best
choice for each blank on your ANSWER SHEET.
Threats from nomadic people in the
north were {{U}}(31) {{/U}} throughout Chinese history. They were
continually attacking the Chinese northern {{U}}(32) {{/U}} . With each
new emperor, came endless debate about how to {{U}} (33) {{/U}}
the barbarians. There were four options: {{U}}(34) {{/U}} offensive
campaigns to drive them away or to destroy them; create defensive garrisons;
develop diplomatic and {{U}}(35) {{/U}} ties with them, or build a wall
to keep them out. All the options were {{U}}(36) {{/U}}
at various times. Experience showed that {{U}}(37) {{/U}}
campaigns were too costly and very risky, {{U}}(38) {{/U}} defensive
garrisons could not respond quickly enough {{U}}(39) {{/U}} lightning
attacks along a long border. The third option would seem to be a very
{{U}}(40) {{/U}} one and it was in fact tried successfully {{U}}(41)
{{/U}} a couple of occasions. Wall building became the most favored option
in many dynasties. The three dynasties which {{U}}(42) {{/U}} the most
walls were the Qin, the Han and the Ming. The effectiveness of
the Great Wall in history is still a controversial {{U}}(43) {{/U}}
Historical records show that the wall {{U}}(44) {{/U}} at many times
{{U}}(45) {{/U}} repel invaders. Only on two occasions when a dynasty
weakened from {{U}}(46) {{/U}} were invaders from the north
{{U}}(47) {{/U}} advance and conquer. {{U}}(48) {{/U}} ,
scholars think the Chinese wall builders were themselves responsible for the
unrest on the border. The nomads were people who did not farm, so they
{{U}}(49) {{/U}} trade with China for many essentials. When the Chinese
refused to trade with them, they had no option {{U}}(50) {{/U}} raid
border towns.
【答案解析】固定搭配题。from within意为“自内部,从里面”,weakened from within(=from inside)意为“从内部削弱”。from outside意为“来自外部”;没有from between这个搭配;from under意为“由底部”,这三项均不合文意。
【正确答案】
D
【答案解析】短语辨析题。此句为only on two occasions置于句首的部分倒装句,主语invaders from the north前有动词were。liable to意为“容易……的”;prone to意为“倾向于……”,这两项不符合该处语境。[B]和[D]含义相同,但be capable of后要接续动名词doing sth. ,因此只有be able to合适。