You can't imagine that a well－behaved gentleman ________ be so rude to a lady.
| A．might | B．need | C．should | D．would |
---He is fifteen years younger than you.
---?
| A．How come | B．So what | C．How then | D．if so |
Although his experiments were designed to support the ideasthe influence of environment upon plants, Mendel found that many characteristics were passed on from one generation to the next.
| A．concerning | B．attaching to | C．involving in | D．concerning with |
They are experienced porter(搬运工)who know how tothe weight of the rocks they carry.
| A．spread | B．put | C．launch | D．take |
So fastat the lecture that I missed much of it.
| A．he did speak | B．he spoke | C．did he speak | D．did he spoke |
Nothing he did was helpful to solve this problem,?
| A．didn’t he | B．was it | C．wasn’t it | D．did he |