it has great potential to produce abundant clean energy
NIF has just finished constructing a practical fusion reactor
extreme temperatures are needed to work it
it has not been successfully used to produce net energy gain in labs
第1题：
Which of the following can we infer from the passage?
A．Everyone has his lucky day.
B．The supermarket is dishonest.
C．The supermarket might just play a trick so customers should be more cautious.
D．Wives should listen to their husbands.
第2题：
Progress so far very good and we are sure that the work will be finished on time.
A. was B. had been C. has been D. will be
第3题：
Helen loves to talk about travel. She _____ many places.
A. has gone to B. has been to C. has gone for D. has been from
第4题：
A、finished
B、was finishing
C、has finished
D、had finished
第5题：
From this passage, we can guess that the writer ______.
A. likes elephants
B. has a very large garden
C. admires the wonders of nature
D. likes to measure things
第6题：
We can obviously notice that over a period of no practice what has been learned tends to be forgotten from______.
第7题：
Mr. White has been_____（缺席的）from work for days, so he knows nothing about our new plan.
第8题：
Mr. White has been --------（缺席的）from work for days, so he knows nothing about our new plan.
第9题：
Within the team, a work plan can tell each member what()and why.
A. is being done
B. has done
C. has been done
第10题：
We can infer from the passage that_____.
［A］ Shearer has experienced many violent incidents ［B］ new tools have been used to investigate terrorists
［C］ FBI has been active in the war on eco-terrorism ［D］ ELF openly declares its beliefs and ends