一題英文文法問題

During the course of its growth, a frog undergoes a true metamorphosis--------with a fishlike larval stage.A.     beginB.     beganC.     beginningD.     is begun我知道有動詞undergoes後第二個動詞要用動名詞所以選c但我記得有... is(was)那種 所以覺得b也有可能可能觀念混淆了請跟我解釋讓我下次不會在因為觀念不正確而選到b謝...
2 answers 2