We cannot figure out ____quite a number of insects, birds, and animals are dying out.
| A．that | B．as | C．why | D．when |
Building a new school is one thing, while keeping it running smoothly is quite_______.
| A．the other | B．another | C．neither | D．others |
China has been pushing the reform of public hospitals ______ all its citizens.
| A．in charge of | B．for the purpose of |
| C．in honor of | D．for the benefit of |
I don’t believe we’ve met before, ________ I must say you do look familiar.
| A．therefore | B．although | C．since | D．unless |
Harrison Ford is thought to be one of the few movie stars ____ as a carpenter before.
| A．to work | B．to be working |
| C．to have worked | D．to have been working |
_____ an important decision more on emotion than on reason, you will regret it sooner or later.
| A．Based | B．Basing | C．Base | D．To base |