单项选择题
It's reported that by the end of this month the output of cement in the factory ______ by about 10%.
单项选择题 The last half of the nineteenth century ______ the steady improvement in the means of travel.
单项选择题 There were 30 students and ______ of them passed the exam.
单项选择题 Experienced teachers make ______ mistakes than beginners.
