有关宾语从句的练习,请详细说说语法点,

有关宾语从句的练习,请详细说说语法点,
宾语从句
11．I just want to know_______.
A.when you have arrived
B.how can I spell the word “restaurant”
C.how did you work out the difficault problem
D.what’s the matter with you
14.Could you tell me _________?
A.when will the scientist arrive
B.when the scientist would arrive
C.when the scientist will arrive
D.when would the scientist arrive
17.Sorry,I can’t tell you_________?
A.when the meeting has begun
B.who will come to take the lesson
C.what the matter is with the machine
D.how you can make for me
18.Could you please tell us________?
A.whether his mother has arrived or not
B.how can I choose an MP3
C.if he paid the visit to his relatives
D.why is the girl crying
19.Could you tell me_________?
A.when will the meeting begin
B.when the meeting begins
C.when the meeting began
D.when the meeting would begin
20.Could you tell me_________?
A.when are they going go set out
B.when they are going go set out
C.when were you going to set out
D.when they were going to set out
21.Would you please tell me_________?
A.when your father has come back
B.where your father would play tennis
C.why your father didn’t watch the match
D.if your father had seen this film
22.There’re so many types of digital cameras in this shop,I really don’t know______.
A.to buy which B.to buy what C.which to buy D,what to buy