Question

The teacher won’t begin the class ______ all the students ______.

A．until ; stop to talk	B．until; stop talking
C．if; stop to talk	D．if ; stop talking

Answer 1

B解析:
此題考查了兩個(gè)知識(shí)點(diǎn)“not...until”意為“直到...才”和“stop to do sth”與“stop doing sth”的區(qū)別。