Someone is knocking at the door. Please go and see ____________.
A. who it is B. who is he
C. who he is D. who is it
Yuan Longping has devoted all his life _______ the research and the _______ of the rice plants.
A. on, development B. to, development
C. to, developing D. on, developing
Though they are _______ little children, they have worked out _______ many difficult math problems.
A. so, so B. such, such
C. so, such D. such, so
________ of the students in our class ________ interested in WeChat on the Internet.
A. Two-fifths, is B. Two-fives, is
C. Two-fifth, are D. Two-fifths, are
Marie Curie also ________ the use of X-ray machines, ________ now widely used in hospitals.
A. pushed for, which is B. pushed out, which are
C. pushed for, which are D. pushed in, which is
—I’ve got _________ lovely pet cat from my aunt. —Wonderful! Is it ______ one sitting on your bed?
A. a; a B. a; the C. the; a D. the; the
