His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽)
#78803
A
that
B
how
C
who
D
what
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—Could you tell me_______?. —Sure. Walk along this road ,you can find it on your left. There you’ll see many old things. 
#36865
A
how I can get to the post office
B
where is the aquarium
C
if where is a museum near here
D
where I can get a dictionary
—Could you please tell me _____________? --“Rome wasn’t built in a day”. You should try to give it enough chances to become strong.
#38284
A
why I should do to have a good memory
B
what I can do to have a good memory
C
how can I do to have a good memory
D
what can I do to have a good memory
Have you seen Tom recently? I wonder ______ with his students.
#79184
A
how is he getting along
B
if he is getting along well 
C
what he is getting along
D
that he gets along well
I really don’t know ___________.
#38533
A
how they’ve got so angry with me.
B
why have they got so angry with me.
C
how have they got so angry with me.
D
why they’ve got so angry with me.