单项选择提升训练
( )11. What happened to Marys brother?
He _______ off while he _________ a bike.
A.was falling, rode B. fell, was riding C. falls, is riding D. was falling, was riding
( )12. There are ______ books in the library. Now there are about _____ students reading in it.
A. thousands of, two hundreds B. thousand of, two hundred
C. thousands of, two hundred D. thousand of , two hundreds
( )13. The chicken in your bowl _________ delicious. I want some more.
A. looks B. tastes C. smells D. sounds
( )14. We will go to visit the World Park __________ it doesnt rain tomorrow.
A. if B. when C. since D. because
( )15. ________ elephant is much bigger than _________ tiger.
A. An, a B. An, / C. A, a D. A,/
答案：1115 BCBAA