A competent speaker of a language must have a(n)________ of these different styles.

A．comment B．observation C．command D．response

Don’t respond to any e?mails________ personal information，no matter how official they look.

A．searching B．asking C．requesting D．questioning

—Oh，it’s you！I didn’t________ you.

—We haven’t seen each other for several years.Glad to meet you again.

A．realize B．recognize C．know D．see

—Four dollars a pair？I think it’s a bit too much.

—If you buy three pairs，the price for each will________ to three fifty.

A．come down B．take down C．turn over D．go over

—Have you bought the dictionary?

—No.I have________ two yuan on me.

A．more than B．no more than

C．over D．more over

We can’t give up________ we should fail 10 times.

A．even if B．since C．whether D．until

—John！Is this bag yours?

—Yes.It is the same bag________ I lost yesterday.Where did you find it？

A．which B．as C．that D．so

I couldn’t remember the exact date of the storm，but I knew it was________ Sunday because everybody was at________ church.

A．a；the B．a；/ C．/; a D．/；/

“Don’t worry about me，” she ________ her sister.

A．said to B．referred to C．thanked to D．spoke

The number of people who________ English as a foreign language________ more than 750 million.

A．learns；is B．learn；are C．learns；are D．learn；is