101. We on it for many hours but we have not yet reached any conclusion.

A. work B. have been working C. have been worked D. are working102. Professor Williams told us that by the end of this year he here for two years.

A. will have worked B. will have been working

C. would have been working D. has been working103. He for six years by the time he takes his examination.

A. had been studying English B. will have been studying English

C. studied English D. studies English104. In another year or so， you all about it.

A. would forget B. forget C. have forgotten D. will have forgotten105. By the time you got to San Francisco tomorrow， I for Southeast Asia.

A. shall have left B. will leave C. am leaving D. have already left106. We working on the project by the end of next year.

A. shall have finished B. shall be finishing

C. will be finishing D. shall have been finished107. Mr. Smith with the government for thirty-seven years by the time he retires.

A. will work B. will have worked C. will be working D. will have been working108. Next month they in the United States for thirty years.

A. are B. have been C. will be D. will have been109. By 2050， scientists surely a cure of cancer.

A. have discovered B. must discover C. are discovering D. will have discovered110. I the novel by the time you come back next week.

A. have finished B. shall have finished C. finish D. shall be finished111. The information is urgently .

A. need B. needing C. needs D. needed112. I’ll take down your name and address in case you as a witness.

A. are needed B. will be needed C. need D. will need113. By next week the new regulation .

A. will introduce B. are to introduce C. are to be introduced D. will have introduced114. “ I thought you were building a ship. Why not put it in the lake?”

“ Because it .”

A. hasn’t finished yet B. would not finish C. wasn’t finished yet D. didn’t finish115. I’ll be going to school on foot while my bike .

A. is repaired B. is being repaired C. was being repaired D. is to repair116. The goods when we arrived at the airport.

A. were just unloading B. were just being unloaded

C. had just unloaded D. were just been unloaded117. All the apparatus before the experiment begun.

A. prepared B. were prepared C. had been prepared D. have been prepared118. Gregory told Mary that he what he was doing during the vacation.

A. had just been asked B. had just asked C. was just asked D. just asked119. Work on the motorway owing to bad weather.

A. recently hold up B. is recently held up

C. has recently been held up D. will recently be held up120. The children many times not to go near the lake.

A. have told B. told C. have been told D. were being told