No one really knows for sure ________ makes a person become right-handed rather than left-handed.
#78859
A
whatever
B
who
C
what
D
whoever
推荐题目
I wonder_________it is worth_________. 
#39257
A
that, reading
B
if, reading
C
that, to read
D
whether, to read
— Could you tell me ____________? — I don’t know. It seemed to be unimaginable.
#37659
A
whether “Dad, where we go” was popular
B
how was “Dad, where we go” well-known in China
C
why “Dad, where we go” is popular with all in China
D
when “Dad, where we go” is so well-known in China
—Could you tell me __________.— In ten minutes.
#38568
A
how long he will come back
B
how soon he will come back
C
how far is your school from here
D
how often are you late
---Do you know how long ________?  ----I’m sorry I don’t know.
#36739
A
he has come here
B
has he been married
C
Tom has bought the car
D
his uncle has been abroad