With a lot of maths problems ________, I can't go to see the film with you tonight．

A．solved

B．solving

C．to solve

D．being solved

Mark Twain, whose ________ name was Samuel Clemens, was one of the greatest writers in America．

A．true

B．right

C．false

D．real

Words failed me when I wanted ________ my thanks to him for having saved my son from the burning house．

A．to express

B．expressing

C．to be expressed

D．being expressed

We can see Lucy is ________ from her ________ expression on her face．

A．satisfied; satisfying

B．satisfied; satisfied

C．satisfying; satisfied

D．satisfying; satisfying

－Each of the students, ________ hard at his or her lessons, hopes to go to college．

－So do I．

A．works

B．working

C．to work

D．to be worked

The United States is made up of fifty states, one of ________ is separate from the others by the Pacific Ocean．

A．them

B．those

C．which

D．that

It is not surprising you are tired．________ you were up until 11 o'clock last night．

A．After all

B．As a result

C．In other words

D．As usual

－I drove to the railway station to meet my friend coming from Zhuhai yesterday．

－Is that why you had an afternoon ________?

A．off

B．out

C．away

D．on

－Sleep well last night?

－Far from that!Some mosquitoes ________ around me now and then．

A．flew

B．had flown

C．had been flying

D．were flying

At the time of the Gettysburg battle, the American Civil war came to ________ the turning point．

A．call what many historians

B．what many historians call

C．call that many historians

D．that many historians call