1 . ______(watch) so many impressive and wonderful movies, I may pretentiously (自命不凡地) believe that I have a say in recommending you a movie I like most. (所给词的适当形式填空)

2 . ________ much of her life away from Europe, Stark decided to go back to live out her final days.

A．Spending

B．To have spent

C．Spent

D．Having spent

3 . A gang of youths had been seen________ fireworks at each other near the shop, and this might have had something to do with the fire starting.

A．to be throwing	B．to have thrown
C．throw	D．throwing

4 . Daylight saving time begins at 2: 00 a. m. local time on the second Sunday in March, ________clocks spring forward an hour, typically ________observers to lose an hour of sleep.

A．which, caused

B．when, causing

C．which, causing

D．when, caused

5 . Scientists observed that an unexplained burst of light ________600,000 suns in brightness occurred from a star in the universe.

A．equaling to

B．was equal

C．equaled

D．equaling