She couldn’t have done that sort of thing. — Whatever she did was reasonable, （ ） to what you did. Besides, it’s none of your business. Get down to （ ） your lessons.
（A）comparing; doing
（B）comparing; do
（C）compared; doing
（D）compared; do
Mary worked late into the night, （ ） she had not finished even half of the job.
（A）only finding
（B）only found
（C）only find
（D）only to find
From the dates （ ） on the gold coin, we know that it was made 500 years ago.
（A）marking
（B）marked
（C）to mark
（D）to be marked
