_______they visited the Science Museum, they showed great interest in everything they saw.
| A．For the first time | B．At first |
| C．At the first time | D．The first time |
these trials, people are ________assigned to a "treatment" group, which benefits from the project, and a "control" group, which does not.
| A．initially | B．conventionally |
| C．superbly | D．randomly |
Asian Infrastructure Investment Bank (AIIB）, its headquarter______ in Beijing, is an inter-governmental agency which is intended for multi-development of Infrastructure in Asia.
A. located B. locating
C. locates D. to locate
In 1973, a book ________ that plants can feel emotions, prefer classical music, and can respond to the unspoken thoughts of humans landed on the New York Times best-seller list.
| A．having claimed | B．had claimed |
| C．claiming | D．claimed |
To keep up with their work, the vast majority of office clerks today must read letters, reports, trade publications, interoffice communications, to say _______ of newspapers and magazines.
| A．everything | B．anything | C．nothing | D．something |
The new financial policies of the US government have _______ a chain reaction in the international money markets.
| A．gone off | B．set off |
| C．seen off | D．got off |