Which letter is unpronounced(不发音)in the word‘know’?

A．k

B．n

C．o

D．w

Suddenly, Mr Smith sees something on the grass．He ________．

A．picks it up

B．pick it up

C．picks up it

D．pick up it

The park keeper ________ a sign and says,“Do not touch”．

A．points at

B．point at

C．points to

D．point to

The girl over there is only ________．

A．three－years－old

B．three years old

C．three year olds

D．three years olds

Which sign means‘No parking’?

A．

B．

C．

D．

－What does this sign ________?－It ________‘Be quiet’．

A．means; mean

B．means; means

C．mean; mean

D．mean; means

You can’t ________ TV now．You should ________ books．

A．watching; reading

B．watches; reads

C．watch; read

D．watched; read

His daughter is only two, but she knows a lot ________ insects．

A．for

B．about

C．with

D．between

The sign on the grass means we should keep ________ the grass．

A．on

B．in

C．off

D．of

There ________ little ________ in the reading room．

A．is; noise

B．is; noises

C．are; noise

D．are; noises