Music should be taught routinely in schools because of the benefits ______ can have on the development of the brains of young children.
| A．which | B．that | C．it | D．one |
After Chang’e-3 landed on the moon on Dec 14, China became the third country _________ this after the US and the former Soviet Union.
| A．having achieved | B．achieving | C．achieved | D．to have achieved |
---Excuse me, has the train from Beijing arrived yet?
--- ________, you are three quarters earlier. It's only 9 now.
| A．Unconsciously | B．Instantly | C．Absolutely | D．Actually |
The speed limit for bicycles on campus is 15 mph, ___________ otherwise posted.
| A．unless | B．until | C．since | D．however |
In manufacturing, cheaper materials are constantly being for the better, more expensive kind.
| A．maintained | B．cancelled | C．substituted | D．deposited |
I have no idea of what is in fashion nowadays, so my choice might be quite ____.
| A．abundant | B．arbitrary | C．considerate | D．aggressive |