Train as hard as you can ____ you’ll win the swimming competition.
A. then
B. but
C. and
D. or
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I’m sorry to have to say this, ____ you forgot to turn off the lights when you left the room last night.
A. and
B. but
C. so
D. because
Mary went to bed early, ____ she felt very tired.
A. or
B. so
C. for
D. yet
As he is strong, ____ can lift one hundred pounds.
A. yet he
B. but he
C. and
D. he
She set out soon after dark ____ home an hour later.
A. arriving
B. to arrive
C. having arrived
D. and arrived
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