—_____ you use to play football?
—Yes, you are right.[ ]
A. Are
B. Do
C. Did
D. Will
答案:C
-----Have you got used to the Chinese food, Robert?
-----Yes, but I don't like ______ when a Chinese host keeps serving me the food I don't like.
A.this
B.that
C.those
D.it
公钥密码学的思想最早是()提出的。
A、欧拉(Euler)
B、迪菲(DiffiE.和赫尔曼(Hellman)
C、费马(Fermat)
D、Rivest、Shamir、Adleman