Don't be discouraged （ ） you have fallen behind others.
（A）whether
（B）as if
（C）even if
（D）however
Hardly had we reached home （ ） it began to rain.
（A）before
（B）than
（C）as soon as
（D）when
（ ） I get to Paris, I'll call you up at the airport.
（A）Since
（B）While
（C）Once
（D）Although
