题目内容
（请给出正确答案）
A.keep
B.maintain
C.retain
D.protect
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更多“【27】A．keepB．maintainC．retainD．protect”相关的问题
A、Backward integration
B、Horizontal integration
C、Forward integration
D、Related diversification
A、Therefore
B、Once
C、So
D、Later
A、test cross
B、epistasis test
C、complementation test
D、allelic series test
E、biochemical test
Most of us have also had trips! that we would 【27】______ to forget. Many conditions can pro duce a bad! 【28】______ experience. For example, if the four conditions 【29】______ above do not exist, we will probably have a bad experience, 【30】______ at best a difficult 【31】______ . Students who travel to a 【32】______ country to study often have a difficult trip. They usually travel 【33】______ They don't know the language of the new country 【34】______ . They often arrive in the new country 【35】______ a judge international airport. From the airport, they need to 【36】______ their way to their school. Maybe they need to 【37】______ airplanes, to! take a bus, a train, or a taxi. They need to do all this in a country 【38】______ everything is unfamiliar. Later, after the experiences are 【39】______ , they can laugh. But at the 【40】______ , they feel terrible.
【21】
A．happy
B．enjoyable
C．amusing
D．favorable
A．King George m's plan to gather money in North America
B．the British government's desire to raise money in North America
C．a plan to share the expenses of maintaining an army in the American colonies
D．a decision of the British Parliament to collect money in the American colonies
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