difficulties we’ll meet,we must finish the work in time.
Doctors have said that as many as 50 percent of patients don’t take medicine ____ directed.
Most people usually have less money at the end of the month than ____at the beginning.
My cousin keeps the photo ____ he can see it every day, as it always reminds him of his college days in Florida.
These two countries are similar ____ they both have a high snowfall during winter.
We see the lightning ____ it happens, but we hear the thunder later.