Scientists from different countries are trying to_____ a good way to solve the energy problem.
A. keep up with B. come up with
C. catch up with D. meet up with
Detective Lu thought that ________ Xie Yiming ________ Wang Gang were likely to kidnap Guan Dawei’s son.
A. either, or B. both, and
C. neither, nor D. not only, but also.
With a record of more than 90 goals in 2012, Messi is considered as the_______ football player in the world.
A. successfully B. successful
C. most successfully D. most successful
----Where is Tom now, Millie?
----I saw him _______ in the street a moment ago and I told him _________.
A. playing; don’t do so B. playing; not to do so
C. play; to do so D. play; don’t do so
______ time goes by, China is getting stronger and stronger.
A. Until B. While
C. As D. When
---- You'd better_______ some popcorn or soft drinks before the film begins.
---- But I think it's better _______ anything while watching the film.
A. buy; not have B. to buy; not to have
C. to buy; not have D. buy; not to have
