I ______ her, but I never could.
Every year, billions of dollars are spent on space travel. Is that right_______ millions of people are hungry here on Earth?
No matter how low you consider yourself, there’s always someone_______ youwishing they were that high.
My brother’s irresponsible behavior_______ my mother many sleepless nights.
–Which is _______more developed country, the United States or Canada?–The former in_______ way.
The safety helmet saved the worker; otherwise, he_______ by a flying object.