核对与清查的要求：

--- Will Guo Jingming’s new book ___________ in August this year?

--- Sorry, I’m not sure.

A．come from

B．come out

C．come back

D．come down

自然资源的基本特征有哪些？

丙酮酸还原为乳酸，提供所需氢的是

A．FMNH₂

B．FADH₂

C．FH₄

D．NADH＋H⁺

E．NADPH＋H⁺

改错。

1. Both you and your sister studies hard.                                     

2. Not only we but also she are going to the movies.                                      

3. Either he or I are to go.                               

4. Neither him nor his parents are coming.