John does important research _______ the best ways to help the old.
A. finds B. finds C.found D. to find out
Many wild animals don’t have a safe place to live, ___________people are taking away their land and forests.
A. when B. while C. because D. and
We stayed there and watched the opera ______ an hour.
A. in B. for C. at D. on
Look , this year the player are training _________.
A. exciting B. busy C. carefulD. carefully
The library is __________ than the classroom.
A. tall B. much bigger C. the newest D. wide
It’s _____ good idea to spell and pronounce new words aloud every day.
A. a B. an C./ D. the
