he was tired,( )he still worked hard.
A. Though; but
B.Though; and
C. Though;／
D.Although; or
第1题：
（ ）
A． group
B． you
C． route
D． though
第2题：
[A] but [B] whereas [C] though [D] while
第3题：
A. In spite of
B. Besides
C. Beside
D. Though
第4题：
Cows must eat grain, ________ they will not grow fat.
A、or
B、but
C、when
D、though
第5题：
The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
A. what
B. which
C. that
D. though
第6题：
______ I should fail again, I will not give up the experiment.
A. Even so
B. Although
C. Even if
D. Though
第7题：
38_____
A.once
B.if
C.because
D.though
第8题：
替牙he期间上下牙弓的咬合关系发展由()。
A.中性he关系→近中he关系
B.远中he关系→中性he关系
C.近中he关系→中性he关系
D.中性he关系→远中he关系
E.持续中性he关系
第9题：
A. Since
B. As long as
C. As
D. Though