Bob is young, _______ he knows a lot. 
#58536
A
because
B
so
C
but
D
unless
推荐题目
---________?---I failed the exam.
#55538
A
Can I help you
B
Why are you so happy
C
What’s the matter
D
Can you help me
----_______is your sister?     ---She is thirteen years old. 
#56258
A
How many
B
How old
C
How much
D
How long
The little girl felt upset _________ her pet dog died.
#58096
A
why
B
because of
C
because
D
what