．Nooneknowsexactlywhenourances

．No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．

A．which

B．what

C．it

D．they

登录免费查看答案和解析

相关试题

Every time he had a chance，he would talk about the great difficulty he had _____ in the new country．

A．settled

B．settling

C．to settle

D．settle

收藏答案/解析

There is nothing more I can try _______you to stay, so I wish you good luch.

A．being persuaded

B．persuading

C．to be persuaded

D．to persuade

收藏答案/解析

______ by a greater demand of vegetables, farmers have built more green houses.

A．Driven

B．Being driven

C．To drive

D．Having driven

收藏答案/解析

The crowd cheered wildly at the sight of liu xiang, who was reported _______ the world record in the 110-meter hurdle race.

A．breaking

B．having broken

C．to have broken

D．to break

收藏答案/解析

—Come on, please give me some ideas about the project.
—Sorry. With so much work _______ my mind, I almost break down.

A．filled

B．filling

C．to fill

D．being filled

收藏答案/解析