11.We rang the doorbell again _______ they hadn’t heard it the first time.
A. because B. although C. for fear that D. in case

10.It is obligatory _______ the instructions on the label strictly.
A. when using this chemical they must follow
B. this chemical is used by following
C. the use of this chemical follow
D. for this chemical to follow

8.My father retired from work last month. He _______ for the same company for 40 years.
A. has worked C. had worked
B. had been working D. was working

8.My father retired from work last month. He _______ for the same company for 40 years.
A. has worked C. had worked
B. had been working D. was working

7.We live very far from the station, so she _______ a taxi because got here just ten minutes after the arrival of the
train.
A. must have taken B. would certainly take
C. had to have taken D. had to take

6.Do you know when his new album is _______? I’m looking forward it.
A. set out B. brought out C. broken out D. taken out

5.The dream was so _______ that I was convinced it had really happened.
A. bright B. lively C. vivid D. colorful

4.Oh, I’m always forgetting _______ these medicines. Is that before or after meal, Ron?
A. when to take B. what I will take with
C. on which I should take D. when I take

He has passed the test with excellent result. He must have been working very hard,_______?
A. hasn’t he B. didn’t he C. wasn’t he D. mustn’t he

_______ failing, the new car was an enormous success.
A. Far from B. Despite C. Apart from D.Although