请给下列算术式找答案(每题2分,共14分)。
(1)six + four = _______
A.ten B.seven C.eleven
(2)three + five = _______
A.eight B.nine C.twenty
(3)seven + two = _______
A.nine B.eight C.forty
(4)one + five = _______
A.six B.thirty C.eight
(5)three + four = _______
A.seven B.fifty C.seven
(6)two + three = _______
A.five B.twenty-four C.twelve
(7)four + five = _______
A.nine B.one hundred C.ninety