Earthquakes always happen , so it is difficult to know when they come.
Elephants are _____ bigger than rabbits.A. much B. little C. very
Which subject is _____ , English, math or Chinese?A. the most difficultB. the more difficultC. most difficult
—How many students are there in your school?—_______ students, I think.A. Three thousandsB. Three thousandC.Three thousands of
The boy stopped ___TV and went to do his homework when his mother came back.A. watch B. watching C. to watch
Math is _____ difficult for some students _____ learn.A. too, to B. enough, to C. much, to