实践：

　　1.We are _____ going to the factory and work there.

　　A. briefly

　　B. lately

　　C. recently

　　D. shortly

　　2.For most students, their teacher's advice is more important than ______ of their parents.

　　A. one

　　B. what

　　C. which

　　D. that

　　3.They talked in a low voice ______ be heard by others.

　　A. so not as to

　　B. so as not to

　　C. so as to not

　　D. so as to

　　4.Not until this evening ______ that the meeting had been put off.

　　A. I did know

　　B. did I know

　　C. I knew

　　D. I have known

　　5.We are looking forward to seeing you again,and we'll be very disappointed if you ______.

　　A. didn't come

　　B. haven't come

　　C. won't come

　　D.don't come

　　6.If I _______ there earlier, I ________ him.

　　A. had arrived ,would have met

　　B. have arrived, would have

　　C. arrived, have met

　　D. arrived, had met

　　7.Lily is said ______ for London last month.

　　A. to have left

　　B. to leave

　　C. to be leaving

　　D. to be left

　　8.Life on earth ______ impossible unless we stop destroying the forest and poisoning the oceans.

　　A. was

　　B. has been

　　C. will have been

　　D. will be

　　9.The twins will go fishing with us this weekend _______ they are free.

　　A. though

　　B. if

　　C. whether

　　D. but

　　10. --______ we go at 8:00? --What about _______ it a little earlier?

　　A. Shall, making

　　B. Shall, to make

　　C. Will, making

　　D. Will, make

　　11.New York is bigger than ______ in the United States.

　　A. any other city

　　B. any cities

　　C. any city

　　D. other cities

　　12.Her mother ______ for more than three years.

　　A. has died

　　B. had died

　　C. is dead

　　D. has been dead

　　13.All the guests _______ got to the classroom on time.

　　A. invited

　　B. being invited

　　C. inviting

　　D. to be invited

　　14.At twelve that night we arrived in the village _______ we once lived.

　　A. what

　　B. which

　　C. where

　　D. that

　　15.He ran from house to house, ______ people the good news.

　　A. told

　　B. telling

　　C. tell

　　D. to tell