You can ________ the book for two weeks at one time．

A．keep

B．leave

C．buy

I was at ________ just now．

A．the dentist

B．the dentist’s

C．the dentists’s

When you have time, please ________ my house and have a cup of tea．

A．come in

B．come across

C．come to

She likes the white ________．They look beautiful．

A．some

B．one

C．ones

Listen to your teacher carefully, then you can ________ the lesson．

A．understand

B．understood

C．be understand

________ notes is useful for us to learn English well．

A．Take

B．Taking

C．To taking

How long have you ________ the novel?

A．bought

B．had

C．buy

Where did you ________ the book?

A．bought

B．buy

C．buys

Please send this letter ________ Jim．

A．to

B．with

C．at

Do you like to eat ________?

A．potatos

B．potato

C．potatoes