The woman likes both of the hats．She can't decide ________．

A．to buy which one

B．which to buy one

C．one to buy which

D．which one to buy

The new-designed car is on show now．I wonder ________．

A．how much it cost

B．how much it costs

C．how much did it cost

D．how much does it cost

如果你想知道对方姓什么时，你应该问________

A．What's your name

B．What's your family name

C．What's your first name

D．How old are you

Mr．Smith didn't tell us ________．

A．where does he live

B．where he lived

C．where did he live

Do you remember ________ when China's first space lab, Tiangong-I was sent into orbit?

A．what you were doing

B．what were you doing

C．what you are doing

Wow! There are so many books．I really can't decide ________

A．where to buy

B．which to buy

C．what to buy

D．how to buy

I hear you've got a pen pal．Could you tell me ________?

A．where does she come from

B．where will she work

C．what her name is

D．How did you know each other

I want to know ________ back at 8∶00 tomorrow．

A．that you will come

B．when will you come

C．where will you come

D．whether you will come

No one knows ________ in fifty years．

A．what will our life be like

B．what is our life like

C．what our life will be like

D．what our life is like

Could you tell me ________ the bike without any help this morning?

A．how does he mend

B．how he mended

C．how he mends

D．how did he mend