单项选择题
The（）into the fire accident was carried out by two policemen.
A.question B.doubt C.investigation D.information
单项选择题 Tom succeeded in getting a（）of $3,000 from the bank to buy a new house.
单项选择题 He was asked to speak louder（）all the students in the classroom could hear him.
单项选择题 It（）exactly thirty years since I graduated from college.
