I get up early I could catch up the first bus.
A. so...that..
B. so that
C. because
D. while
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you are not too tired, let's go out to have a walk.
A. If
B. Although
C. But
D. While
he is very old, he is quite strong.
A. Because
B. Although
C. Since
D. If
We must campwe can get water.
A. when
B. where
C. while
D. because
I refused his invitationI had no time.
A. because
B. where
C. so that
D. although