________ electricity plays such an important part in our daily life?

[　　]

Father: Everyone says you are a good student. You never fall asleep in class, do you?

Son: ________.

[　　]

A．Yes, sometimes

B．Yes, I did

C．Yes, never

D．No, I didn't

The manager, as well as his children, ________ going to Shanghai on holiday.

[　　]

 I'm too sleepy.

 You really should stop ________ to bed.

[　　]

I wonder what is ________ at the theatre this weekend.

[　　]

How much money, ________, have you paid for this flat?

[　　]

I never trouble him with anything ________ I have to.

[    ]

A. if   B. though   C. because   D. unless

 Do you know our city at all?

 No, this is the first time I ________ here.

[　　]

________ yesterday ________ I realized I had made a big mistake.

[　　]

A．It was until, that

B．It was not until, that

C．Tha was until , that

D．It was not until , which

The squirrel was lucky that it just missed ________.

[　　]