Question

—Mary was heard ________ just now. What happened?—John was telling a joke. A．to cry B．laug

—Mary was heard ________ just now. What happened?—John was telling a joke. A．to cry B．laugh C．to laugh D．cry

Answer 1

C

试题分析：在使役动词make, let等及感官动词listen, hear等主动语态中，to要省略，但在被动语态中，to不可以省略。句意：结合语境可知既然是笑话，肯定被听到在笑。由于Mary被听到笑了，是被动语态，后面的to不能省略。选C。