—Nathan likes his job because he ______enjoy the beauty of nature.
A. can B. must C. should D. is supposed to
This food is free. You don't have to _________ it.
A. look for B. pay for
C. ask for D. wait for
（题文）—Do you know about Yuan Longping?
—Only a little. But Chinese people are proud of the man ______ hybrid rice
is famous.
A. who B. which C. that D. whose
Fei Junlong and Nie Haisheng are the ______ of our nation.
A. proud B. pride C. prize D. price
A paper-making factory was ____ near the river. It has badly polluted the river water.
A. set out B. grew up C. set up D. fixed up
If he keeps on working so hard, he’ll ____ under the pressure of work.
A. break down B. break up C. break out D. break into
