单项选择题

Not until ______ himself seriously, iii.

A．he had completed the task did he find
B．had he completed the task did he find
C．he completed the task had he found
D．did he complete the task he had found

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热门试题

单项选择题

The first time that Mary ______ she bruised one of her legs and broke______ .

A．had gone skiing, another
B．went skiing, the other
C．went skiing, another
D．had gone skiing, other

单项选择题

A ______ of small glittering fish swam by.

A．pack
B．swarm
C．flock
D．school