My father plans _____ an article about new methods of ______ math.
A. to write; learn B. writing; learning
C. to write; learning D. writing; to learn
The lake near my home used to ________ clean.But now it's too dirty.
A. was B. is
C. be D. are
Waste paper must be ________ good use.
A. put B. put to
C. to put D. puts
Mr. Green asked us to stop____. So we stopped______to him at once.
A. talking; listening B. to talk; listening
C. talking; to listen D. to talk; to listen
We _________ you to have a good trip.
A. wish B. hope C. wish with D. hope to
Song Zuying is known ________ a singer.
A. for B. as
C. of D. to
