1．(2019·南昌一模)We should take active attitude to our studies, and try to get a mark that is true as well as good.
an 解析：attitude表示“态度”为可数名词，表示泛指时单数名词前应加不定冠词，active的发音以元音音素开头，故其前应加an。
2．(2019·长沙一模)After work, he learned to play guitar. He liked living on the farm, for the life was simple.
the/his 解析：考查冠词或物主代词。guitar为乐器，需在其前加定冠词the。因为guitar和主语he是所属关系，故也可以用形容词性物主代词his。
3．(2019·洛阳统一考试)I could only tell him truth. Instead of scolding, he praised my honesty and then encouraged me to apologize to our neighbor.
the 解析：考查冠词。tell the truth为固定词组搭配，故用定冠词the。
4．(2019·四川南充一诊)One discovery I made about giving something away is that it is almost possible to give anything away in his world, and the return often comes in
unexpected way.
an 解析：此处表示回报经常以一种出乎意料的方式出现。way作“方法，方式”讲时，是可数名词，且此处表示“一种……的方式”，unexpected的发音以元音音素开头，所以要用an。
