An increasing number of students, year by year, across China ____ hard to realize their dream of studying abroad.
A．is tryingB．a(chǎn)re tryingC．will tryD．have tried
B

試題分析：考查時態(tài)和主謂一致：句意：隨著學生數(shù)量的越來越多，整個中國都在努力實現(xiàn)他們出國學習的夢想。從句意看是現(xiàn)在進行時，主語是China，因為后面用their，所以這里指中國人，謂語是復數(shù)，選B。
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