We must do something to protect the earth, ____we will lose our home.
Computers first came into use ________.A. in 1950s B. on the 1950s C. in the 1950s
We should know some ways to protect ourselves ____ the earthquake.A. out of B. away C. from
The students were all _______ when they heard the _______ news.A. excited; exciting B. exciting; excited C. exciting, exciting
Mike is taller than _________ in his class.A. any boy B. all the boys C. any other boy
I’m not sure ______ he will come tomorrow.A. that B. if C. when