So mysteriously ______ missing that many puzzles wait to be solved.
| A．did Flight MH370 go | B．Flight MH370 went |
| C．does Flight MH370 go | D．had Flight MH370 gone |
I __________stop by sometime and thank her for all her help.
| A．must | B．would | C．could | D．ought |
I ordered___________pizza and salad. The pizza was nice but__________salad was disgusting.
| A．the, the | B．a, the | C．a, a | D．the, a |
High way and air transport will have to compete with _____ service for passangers nowadays.
| A．good | B．better | C．best | D．the best |
Yang Jiazheng_____a book about Shuangqiao village last year but I don't knowwhether she has finished it.
| A．has written | B．wrote | C．had written | D．was writing |
____ much advice I gave him, he did exactly what he wanted to.
| A．How | B．Whatever | C．No matter | D．However |