The scientist knew nothing about the matter, because he was always _________ himself in his study.
A. burying B. devoting C. focusing D. concentrating
He said he _________ his work, and then we needed to wait for him for a little while.
A. just finished B. was just finishing C. had just finished D. was just finished
How pleasant the picture is to _________!
A. be looked at B. being looked at C. looking at D. look at
Jack went to college last year, _________ to return home until he achieves his goal.
A. determining not B. not determined C. not determining D. determined not
— What’s that terrible noise?
— The boys _________ for a party.
A. are preparing B. have prepared C. prepare D. will prepare
Every minute is made full use of _________ our lessons before the exam.
A. studying B. studied C. to study D. being studied
