He said he ________ hard on his Chinese.

[　　]

Let's have a rest, ________?

[　　]

He ________, but he found it difficult.

[　　]

A．tried not to worry

B．tried to not worry

C．tried don't worry

D．tried didn't worry

I don't know ________.

[　　]

A．where does Li Ming live

B．where did Li Ming live

C．where Li Ming lives

D．where Li Ming does live

The light in the room wasn't ________.

[　　]

I saw a girl ________ on a bike and ________ off.

[　　]

Where ________ my pen? I can't find it anywhere.

[　　]

A．have you put

B．did you put

C．were you putting

D．do you put

Three years ________ since I left my hometown.

[　　]

One day people ________ go to the moon on holiday.

[　　]

My brother ________ in the army for one year.

[　　]

A．has been

B．has joined

C．has taken part in

D．have joined