He _______ English for four years before he went abroad.
A. has studied B. was studying
C. has been studying D. had been studying
Carelessness always contributes _______ car accidents. Therefore, drivers are advised to concentrate their attention _______ driving.
A. for; to B. to; on C. with; on D. in; to
With a lot of difficulties _______, they went to the seashore and had a good rest.
A. settled B. settling C. to settle D. being settled
The number of people present at the meeting _______ two hundred and a number of them _______ from the countryside.
A. is, are B. is, is C. are, are D. are, is
Giving up smoking is a slow and painful _______ for him.
A. pressure B. process C. motivation D. profession
Busy _______ he was, he managed to spare some time to help plan the project.
A. while B. although C. as D. when
