The old man said the accident happened ________ careless driving, so a large sum of money

________ be paid by the driver.[ ]

A. was due to; was due to    

B. is due to; was due to

C. is due to; has due to    

D. due to; was due to

对拆卸较困难的零件，可用（）浸润后再拆卸。

A.肥皂水

B.无水酒精

C.煤油

D.四氯化碳