1 . The forbidden city is believed ________ in the Ming dynasty over 600 years ago.

A．to have been built	B．to have built
C．being built	D．built

2 . The big prize will be awarded to ________ wins the first place in the English speech competition.

A．wherever

B．whoever

C．whatever

D．whomever

3 . Chris heard a woman’s voice in the background, but she couldn’t________ what she was saying.

A．take back

B．set aside

C．keep off

D．make out

4 . In our class there are 50 students, ________ half achieved a score of 140 or higher in the English examination of Gaokao.

A．of them

B．in whom

C．of whom

D．in them

5 . The scientists searched the area for several years. ________, they successfully found the piece of evidence they were looking for.

A．Unfortunately

B．Originally

C．Generally

D．Eventually

6 . Zonghan is an excellent photographer. By the time he graduated, he ________ quite a few popular photos.

A．has taken	B．has been taken
C．had taken	D．had been taken

8 . I can’t find my wallet now. I________ it in the bus just now, but I’m not sure.

A．should leave	B．could have left
C．must have left	D．might leave

10 . According to professor Smith, we don’t have to read the material if we don’t want to, as it is ________.

A．required

B．optional

C．serious

D．meaningful