[求助]GWD-Q2，Q3， 求助啊！

According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours.

A.    According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours.

B.     By skimming along the top of the atmosphere, proponents of a proposed new style of aircraft say it could fly between most points on Earth in under two hours.

C.    A proposed new style of aircraft could fly between most points on Earth in under two hours, according to its proponents, with it skimming along the top of the atmosphere.

D.    A proposed new style of aircraft, say its proponents, could fly between most points on Earth in under two hours because of its skimming along the top of the atmosphere.

E.     According to its proponents, skimming along the top of the atmosphere makes it possible that a proposed new style of aircraft could fly between most points on Earth in under two hours.

这道题最后选择A，我选的是E，总觉得少了点什么，但是又说不出是为什么  求解释！

Q3: GWD-4-17

Although the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its sales at restaurants open for more than a year have declined.

A.    the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its

B.     the restaurant company has recently added many new restaurants across the country and its sales increased dramatically, its

C.    many new restaurants have recently been opened across the country and its sales increased dramatically, the restaurant company’s

D.    having recently added many new restaurants across the country and with its sales increasing dramatically, the restaurant company’s

E.     recently adding many new restaurants across the country and having its sales increase dramatically, the restaurant company’s
        

这道题也是选择A，我选的是C 为什么要用完成时态呢？还有就是，是不是although后面的从句主语要是代词呢？

第一题，E中的its proponents中的its没指代...

第二题，因为未划线部分也用的完成时，整个句子所表现的意思都是完成时。而且C中前面是many restaurants,后面却是its，单复数不对应。

豁然开朗啊 谢谢你哦