_______ let fake products become uncontrolled in the market.
| A．In certain circumstances we can |
| B．In no circumstance can we |
| C．Under any circumstances we can |
| D．Under no circumstances can we |
The school shop, customers are mainly students, is closed for the holidays.
| A．which | B．whose | C．when | D．where |
A bank is the place ____they lend you an umbrella in fair weather and ask for it back when it begins to rain .
| A．when | B．that | C．where | D．there |
English is a language shared by several diverse cultures ,each of____ uses it somewhat differently .
| A．which | B．what | C．them | D．those |
The old town has narrow streets and small houses _____are built close to each other.
| A．they | B．where | C．what | D．that |
She showed the visitors around the museum, the construction _____had taken more than three years.
| A．for which | B．with which | C．of which | D．to which |