_________I have to give a speech, I get extremely nervous before I start. 
#67769
A
Whatever
B
Whenever
C
Whoever
D
However
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________, the gathering crowd burst into applause.
#72802
A
On entering the hall
B
When he took the floor
C
The speaker took his place
D
No sooner had the speaker entered
While having our dinner, _______. 
#68160
A
the door bell rang
B
our newspapers came to the door
C
we heard the door bell ringing
D
the postman brought several letters to us
It was ____ the old worker came that we ____ the  experiment.
#73098
A
until; didn’t begin
B
not until; began
C
until; began
D
not until; didn’t begin