1 . The little boy admitted ________ the glass while playing football.

A．to have broken	B．breaking
C．having been broken	D．to break

2 . Scientists in the 15-16^th century studied the universe by o__________ (观察) the stars, which is so amazing because some of them can calculate so accurately. (根据中英文提示单词拼写)

3 . Bob suggested ________ a bus to the park but in the end we persuaded him ________ his mind.

A．to take; to change	B．taking; changing
C．to take; changing	D．taking; to change

4 . It’s reported that________ of the road________ collapsed. It needs________.

A．three-fourths; was; repaired	B．three quarters; has; to repair
C．three quarters; has; repairing	D．three-fourth; was; to be repaired

5 . —It's too cold now. Would you mind________the window?
—________. Please do it now.

A．to close; OK	B．closing; Certainly not
C．closing: of course	D．to close; Good idea