Question

The boy ___________ go to bed _________ his mother came back. A．won’t ; until B．didn’t ; u

The boy ___________ go to bed _________ his mother came back. A．won’t ; until B．didn’t ; until C．will ; until D．won’t ; before

Answer 1

B

考查not…until结构。据his mother came back应用一般过去式，选B.直到母亲回来，这个男孩才上床睡觉。