They are going to give them ___________.[ ]
A. gift
B. gifts
C. a gifts
D. gift's
答案:B
通过整个采样单元按相同的时间间隔采取子样,称为(),按相同的质量间隔采取子样,称为()。
I'm really positive that this product () all the features you have always wanted.
A.is
B.are
C. have
D. has