That is ______ we differ.
A、thatB
where在本句中引导表语从句。句意：这就是我们的不同之所在。
Theyknewtheyhadto________actiontodealwiththeplaguebeforeitspreadtootherareas.
Iwouldverymuch______tovisitsomeoftheplacesthatIhavebeenreadingabout.
Therediscoveryofthisspeciesofbirdsisoneofthemost___(ordinary)scientificfindingsinrecentyears.
I doubt _______ they can complete the bridge ahead of time.
Each student is to give a short___ (speak)to the rest of the class at the end of the semester.
